Woman's Institute Library of Cookery Volume V Part 12

TABLE I

SIRUPS FOR CANNING FRUITS

Proportions Degrees ------------ With Sirup Sugar Water Hydro- No. Cups Cups meter Uses --------------------------------------------------------------- 1 2 4 28 Open-kettle canning, or pie fruit canned by any method.

2 2 3 30 Open-kettle canning, or pie fruit canned by any method.

3 2 2 40 Open-kettle canning, or sweet fruits canned by cold-pack methods.

4 2 1-1/2 48 Sweet fruits canned by cold-pack methods.

5 2 1 54 Sour fruits canned by cold-pack methods.

6 2 1/2 68 Very rich fruits canned by cold-pack methods; preserves canned by open-kettle method.

80. The density of sirup is also affected by the amount and rapidity of evaporation that takes place in boiling, and these, in turn, depend on the amount of surface that is exposed. For instance, if a sirup is cooked in a large, flat kettle, the evaporation will be greater and more rapid than if it is cooked in a small, deep vessel. Atmospheric pressure affects the rapidity of evaporation, too. In a high alt.i.tude, evaporation takes place more slowly than at sea level, because the boiling point is lower. Thus, in the making of sirups for canning, the first point to be determined is whether the sirup desired should be light, medium, or heavy, and in its preparation the points mentioned must receive consideration.

81. For determining the density of sirup, a _sirup gauge_, or _hydrometer_, will be found useful. This device consists of a graduated gla.s.s tube attached to a bulb that is weighted with mercury. The graduations, or marks, on the tube, or top part, of the hydrometer serve to indicate the percentage of solid matter dissolved in a solution and register from to 50 degrees. To use such a gauge, partly fill a gla.s.s cylinder--an ordinary drinking gla.s.s will do--with the sirup and place the hydrometer in it. The greater the amount of solid matter dissolved in the sirup, the higher will be hydrometer float. Then read the number of degrees registered by observing the mark that is level with the surface of the sirup.

The number of degrees that the hydrometer should register for sirups of different densities--that is, for sirups consisting of different proportions of sugar and water--are given in Table I. This table, in addition, gives the uses that should be made of such sirups, and each one is numbered so that it may be referred to readily later in the recipes for canning fruits.

82. CLa.s.sIFICATION OF FRUITS.--For the sake of convenience in canning, fruits, too, are here divided into groups. These groups, three in number, together with the fruits included in each, are:

1. _Soft Fruits_, which are subdivided into three kinds, namely, sweet, sour, and very sour. The _sweet soft fruits_ include blackberries, blueberries or huckleberries, sweet cherries, elderberries, ripe gooseberries, mulberries, and black and red raspberries; the _sour soft fruits_, apricots, currants, grapes, peaches, and strawberries; and the _very sour soft fruits_, sour cherries, cranberries, green gooseberries, plums, and rhubarb.

2. _Hard Fruits_, which include apples, quinces, and pears.

3. _Special Fruits_, which include ripe figs, k.u.mquats, loquats, nectarines, persimmons, and pineapples.

The advantage of this cla.s.sification, as in the case of the vegetable cla.s.sification, is that, as a rule, all fruits belonging to a group or a subdivision of a group may be canned in the same way and with sirup of practically the same density.

83. CANNING METHODS FOR FRUITS.--The canning of fruits may be done by the several methods previously discussed, but the Cold-pack and open-kettle methods seem to meet with most favor. On account of the sirup used in canning fruit and the acid in the fruit, the open-kettle method is usually fairly successful, whereas, in the canning of vegetables, with the exception of tomatoes, it is not so reliable. The housewife, by experiment, can determine which method will suit her needs best, but by no means should methods be mixed. If a certain method is decided on, it should be adhered to in every detail and carried through without any subst.i.tution. For all methods, as has been mentioned, the fruit should be selected when it is fresh and in good condition, as such fruit has less chance to spoil than fruit that is overripe or has decayed spots. After it is graded for size and condition, the fruit should be washed, stemmed, hulled, seeded, peeled, or halved, quartered, or sliced, depending on the kind. Then the work may be proceeded with according to the canning method that is to be followed.

84. If fruits are to be canned by the open-kettle method, certain precautions must be observed in order to insure success. The sterilization of the product cannot be perfect in this method no matter how carefully the canning is done; and this means that the sugar and the fruit acids must be greatly relied on to a.s.sist in preservation. Still, the jars, jar covers, jar rubbers, and any utensils used for filling the jars must be sterilized and kept in boiling water until the fruit is ready to be canned. Another thing to guard against is the discoloring of the fruit. Any fruit that is likely to become discolored after it is prepared for canning should be kept in salt water until it is ready to be cooked. A solution consisting of 1 teaspoonful of salt to each quart of water will answer for this purpose.

After the fruit has been prepared and while the containers, etc. are being sterilized, it is necessary to prepare the sirup that is to be used. For the sweet fruits of Group 1, No. 1 or 2 sirup should be made; for the sour fruits of this group, No. 2 or 3 sirup; and for the very sour fruits, No. 4 or 5 sirup. The hard fruits may be canned by this method with No. 1, 2, or 3 sirup, while the special fruits require No. 4 or 5 sirup. If the fruit is to be canned for pie, it will be advisable to use thin sirup and then use more sweetening when pies are made.

When the sirup is made by mixing the sugar and water and bringing it to a boil, the prepared fruit should be dropped into it and cooked. The fruit should be cooked in the sirup until it may be easily pierced with a fork or until it is soft. Berries have to be cooked only a few minutes, while the hard fruits may require from 10 to 15 minutes. The jars should be placed upright in a pan of hot water while the boiling fruit from the kettle is poured into them, and as each jar is filled the rubber should be put in place and the cover adjusted and secured. It is important to close one jar before filling another, because the longer a jar remains open the more bacteria will be permitted to enter. Even by working as rapidly as possible and taking the greatest precaution, a certain number of bacteria are bound to enter in this method of canning.

After the jars are filled and sealed, they should be placed upside down or on the side to cool and test for leaks.

85. If the cold-pack method is employed in canning fruit, it is possible to obtain a sterilized product that is dependent for preservation on neither the sirup used nor the acid of the fruit. In this method, the jars, jar tops, covers, and utensils for handling the fruit do not have to be sterilized beforehand. They may simply be washed clean and kept hot in clean water until they are needed. After the fruits are prepared, some are blanched or scalded and cold-dipped, while others are not. They are then packed into jars and boiling sirup is poured over them. Then the rubbers are adjusted, the covers placed on, but not made tight, and the jars are placed under water in the water bath or on the racks in the pressure cooker, which should contain a small amount of water, as has been explained. After cooking the required length of time, the jars of fruit are removed from the cooking utensil, sealed, and allowed to cool.

The sirup used in the cold-pack canning method may be heavier in each case than that mentioned for the open-kettle method, because there is no evaporation, as is the case where fruits are boiled in the sirup before they are placed in the cans, but less will be required if the packing is well done.

GROUP 1--SOFT FRUITS

86. SWEET SOFT FRUITS.--The sweet fruits included in Group 1 --blackberries, huckleberries, elderberries, ripe gooseberries, mulberries, raspberries, and sweet cherries-may be canned in exactly the same way, so that the same general directions will apply to all. Prepare the different kinds of berries, which should be as fresh as possible, by looking them over carefully and removing the poor ones, and then was.h.i.+ng them. To wash them, pour them into a colander and dip it up and down in a large pan of clean, cold water. The less handling such fruits receive, the more perfect will they remain for canning. Prepare sweet cherries, which should be procured with the stems on if possible, by first was.h.i.+ng them and then stemming them. They may be pitted, or seeded, or they may be left whole, depending on personal preference.

Cherries that are not pitted will keep their shape and have a good appearance, but they are not so convenient for eating as those which have been pitted.

87. After the fruit has been prepared in the manner just explained, pack it closely into the hot, clean jars, using a spoon for this purpose and turning each jar as the fruit is poured into it. Press the berries or the cherries down carefully, so that 2 quarts of them will fill a 1-quart jar. Then proceed to make the sirup. As these fruits are the sweetest, they require less sugar than any other. If such fruit after it is canned is to be used for pie making, sirup No. 1 or 2 will be suitable, but if it is to be used for sauce, No. 3 sirup may be used.

When the mixed sugar and water is boiling rapidly, pour it over the fruit packed into the jars. Then place the rubbers, adjust the jar tops, and proceed to sterilize and cook the cans of fruit. Boil these in the water bath for 15 minutes, or cook them in the pressure cooker for 8 minutes at a pressure of 5 pounds or for 4 minutes at a pressure of 10 pounds.

88. SOUR SOFT FRUITS.--Of the sour fruits, STRAWBERRIES, GRAPES, and CURRANTS require about the same quant.i.ty of sugar, that contained in sirup No. 3, 4, or 5 usually being sufficient. Otherwise, the canning process, including the length of time for processing, does not differ materially from that just given for sweet soft fruits.

In the case of strawberries, those which are of medium size and rather dark in color are best for canning; in fact, very large, light-colored strawberries will shrink more than any other kind. The berries are washed in the same way as other berries, but they should not be allowed to stand in water for any length of time, because this will tend to make them soft and mushy. Strawberries must be stemmed after they are washed, and for this purpose a strawberry huller should be utilized. Such a device, which is shown in Fig. 1, permits the stems to be removed without crus.h.i.+ng the berries and soiling the fingers.

In preparing currants for canning, the procedure is the same as for the fruits already mentioned; and the same thing is true of grapes that are not to be seeded. If the seeds are to be removed, however, the procedure up to getting the cans of fruit ready for processing is different, as is here pointed out. After was.h.i.+ng the grapes, squeeze the pulp from the skins and then cook it in a kettle for a sufficient length of time to make it soft. Remove the seeds by forcing the pulp through a sieve. Then add as much sugar as would be used for making the required sirup, and cook until the sugar is dissolved. With this done, add the sweetened, seedless pulp to the grape skins and fill the jars with this mixture.

Then continue the canning process as for the other fruits of this group.

89. The procedure in canning APRICOTS and PEACHES, the other two sour soft fruits, differs slightly from that required for strawberries, grapes, and currants. So that the skins of both of these fruits may be easily removed, they must be scalded, which is an operation that corresponds to blanching in vegetable canning.

For canning purposes, only firm, fresh apricots and peaches that are not overripe should be selected. Also, in the case of peaches, care should be taken to see that they are of the _freestone_ variety, as such peaches may be split easily. _Clingstone peaches_ should not be chosen unless the fruit is to be canned whole or unless an implement for removing the seeds, or stones like that shown in Fig. 2, is at hand.

Proceed with the canning of either apricots or peaches by first scalding them. To do this, put the fruit in boiling water for 1 to 3 minutes, depending on its ripeness. Next, cold-dip it quickly, remove the skins, and, if desired, cut each one in half and remove the seed, or stone.

When thus prepared, pack the fruit into hot jars as tightly as possible, pour sirup No. 3, 4, or 5 over them, filling each jar, adjust the rubber and jar top, and proceed as directed for the cold-pack method. In the water bath, boil the cans of fruit for 15 minutes; in the pressure cooker, cook them for 10 minutes at a 5-pound pressure or for 6 minutes at a 10-pound pressure.

90. VERY SOUR SOFT FRUITS.--Some of the fruits of the third subdivision of Group 1, namely, SOUR CHERRIES, CRANBERRIES, and GREEN GOOSEBERRIES, may be prepared and canned in the same way as those included in the first subdivision. The cherries may be left whole or they may be seeded, as preferred, and all the fruit must, of course, be fresh. For these very sour fruits, sirups Nos. 4, 5, and 6 are required, and the processing time is 15 minutes in the water bath and 10 minutes at a 5-pound pressure or 5 minutes at a 10-pound pressure in the pressure cooker.

91. PLUMS for canning should be fresh and firm, but not overripe. This fruit may be canned with the skins on, but some varieties permit the skins to be removed after scalding, and this may be done if desired.

Prepare the plums for canning by was.h.i.+ng them, and, if the skins are to be left on, by piercing each one in several places with a fork to prevent the skins from cracking. Then scald the plums for about 1-1/2 minutes, cold-dip them quickly, and pack them closely into the hot jars.

Pour sirup No. 4, 5, or 6 over the fruit in the jars, using sirup No. 6 if they are very sour, adjust the rubbers and the covers, and proceed according to the canning method selected. In the water bath, cook for 15 minutes; in the pressure cooker, cook for 10 minutes at a pressure of 5 pounds or for 6 minutes at a pressure of 10 pounds.

92. RHUBARB for canning should be selected when it is most tender. The variety having red stems is the most attractive after it is canned. Only the heavy stems, which should be cut from the leaves, may be canned. Cut these stems into inch lengths, blanch them 1 to 3 minutes in boiling water, and cold-dip them quickly. Then pack these pieces into the jars.

If the rhubarb is being canned for sauce, fill each jar with sirup No. 5 or 6; if it is being canned for pie, use sirup No. 1, 2, or 3. Next, adjust the rubbers and covers and proceed with the processing. In the water bath, cook for 15 minutes; in the pressure cooker, cook for 10 minutes at a 5-pound pressure or for 6 minutes at a 10-pound pressure.

GROUP 2--HARD FRUITS

93. APPLES.--The canning of apples should be done when there is a large supply of summer apples that cannot be stored for winter use or used at once. Canning is also a good means of utilizing windfall apples. This fruit may be canned in quarters for sauce, in slices for pie, or in any other desirable shape or condition.

After apples for canning are selected, wash them, scald, or blanch, them for 1 to 5 minutes in boiling water, and cold-dip them quickly. Next, peel and core them, and cut each one into pieces of any desirable size.

As these pieces are cut, drop them into salt water--1 teaspoonful of salt to each quart of water--to prevent them from discoloring. Then pack the fruit into the jars and fill the jars with boiling sirup. If the apples are intended for pie, use sirup No. 1, 2, or 3; if they are for sauce, use sirup No. 3, 4, or 5. When the jars are filled, adjust the rubbers and covers and proceed with the processing. If the pieces are large, cook them in the water bath for 20 minutes; if they are medium in size, cook them for 15 minutes; and if they are in the form of slices, cook them for 10 minutes. If they are to be processed in the pressure cooker, cook them for 8 to 12 minutes at a pressure of 5 pounds or for 6 to 8 minutes at a pressure of 10 pounds.

If the apples to be canned are first baked or made into a sauce, simply pack them into jars and process them for a few minutes.

94. QUINCES.--Quinces may be canned alone, but they may be combined with apples to good advantage. If canned alone, they may require a heavier sirup than if apples are used with them. Prepare the quinces in the same way as apples. If apples are to be canned with them, cut the pieces of apples twice the size of the pieces of quinces. This should be done because more time is required for cooking the quinces soft. After packing the jars and pouring in the sirup, proceed with the processing.

If quinces alone are in the jars, cook them in the water bath for 30 minutes; but if quinces and apples are combined, cook them for 20 minutes. In the pressure cooker, cook the jars of fruit for 12 to 15 minutes at a 5-pound pressure or for 10 to 12 minutes at a 10-pound pressure.

95. PEARS.--Pears for canning should be firm, but not hard. After sorting and was.h.i.+ng them, blanch them for 1 to 3 minutes and cold-dip them quickly. Then pare, halve, and core them. Pack them immediately into the jars and pour sirup No. 3 or 4 over them. Next, adjust the rubbers and covers and proceed with the processing. In the water bath, cook them for 20 minutes; in the pressure cooker, cook them for 8 minutes at a 5-pound pressure or 6 minutes at a 10-pound pressure.

GROUP 3--SPECIAL FRUITS

96. FIGS.--Although figs are not a common fruit, there are parts of this country, particularly on the western coast, in which they are abundant.

For canning, ripe figs should be selected. To prepare them, blanch them for 2 minutes in boiling water and cold-dip them. Then pack them into the jars and fill the jars by pouring sirup No. 4, 5, or 6 over the figs. Proceed with the remainder of the process as in canning peaches.

97. k.u.mQUATS AND LOQUATS.--k.u.mquats and loquats are small acid fruits resembling oranges in color and plums in size and shape. Such fruits are not very common, but they may be obtained in some markets. To can either of these fruits, wash them, blanch for 5 minutes, cold-dip, pack into jars, and fill the jars with sirup No. 5 or 6. In the water bath, cook them for 15 minutes. In the pressure cooker, cook them for 10 minutes at a 5-pound pressure or for 5 minutes at a 10-pound pressure.