Transactions of RHASS Volume 1940 - Page 236
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| Year | 1940 |
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| OCR Text |
50 CHEMICAL DEPARTMENT. samples should be taken as quickly as possible, and put into bottles or tin cases to prevent loss of moisture, and having been labelled, should be sealed by the samplers—one or more samples to be retained by the purchaser, and one to be sent to the Chemist for analysis. FEEDING-STUFFE. Samples of feeding-stuffs which are in the form of meal may be taken in a similar manner to that mentioned above. Samples of cake should be taken by selecting four or more cakes from the bulk. These should be nutted to a size not larger than walnuts. The nutted cake should then be thoroughly mixed and samples of not less than one pound each taken from it. The samples should be put into bottles or tins, sealed up, and labelled. One sample should be sent to the Chemist, and one or more duplicates retained by the purchaser. VEGETABLE Pnonuc'rs. Tumips, (£70., at least 50 bulbs carefully selected as of fair average growth. Hay, straw, cnsilage, dad, should be sampled from a thin section cut across the whole stack or silo, and carefully mixed ; above 2 lb. weight is required for analysis. Grain should be sampled like manures. Grass should be representative of the whole field; about 5 lb. weight is required for analysis. DAIRY PRODUCE. Milk—Samples of milk from individual cows should be taken direct from the milk-pail after complete milking. Average samples from a number of cows should be taken immediately after milking. Specify whether the sample is morning or evening milk, or a mixture of these. Samples to be tested for adulteration should not be drawn from the bottom or taken from the top of standing milk, but they should be ladled from the vessel after the milk has been thoroughly mixed. Samples of milk should be sent immediately to the Chemist. For most purposes a half-pint bottle of milk is a large enough sample. Bunch—About quarter-pound samples are required. WATERS. When the water is from a well, it should be pumped for some minutes before taking the sample. If the well has been standing unused for a long time, it should be pumped for some hours, so that the water may be renewed as far as possible. If the well has been newly dug or cleaned out, it should be pumped as dry as possible, daily, for a week before taking the sample. Water from cisterns, tanks, ponds, 850., should be sampled by immersing the bottle entirely under the water, and holding it, neck "‘ "w.- CHEMICAL DEPARTMENT. 51 upwards. some inches below the surface. Water from the surface should not be allowed to enter the bottle. Spring or stream water should not be sampled in very wet weather, but when the water is in ordinary condition. Such waters should be sampled by immersing the bottle. If not deep enough for that purpose, a perfectly clean cup should be used for transferring the water to the bottle. When the bottle has been filled the stopper should be rinsed in the water before replacing it. Interference with or disturbance of wells or springs, or the ground in their immediate vicinity, must be carefully avoided during sampling, and for at least twenty-four hours before it. After a sample has been taken, it should be sent to the Chemist as speedin as possible. A description of the source and circumstances of the water should accompany the sample, as the interpretation of the analytical results depends to some extent on a knowledge of such particulars. N .B.—Stone jars and old wine bottles are unsuitable for conveying samples. Winchester quarts chemically cleaned should be obtained from Dr J. F. TOOHEB, Crown Mansions, 41§ Union Street, Aberdeen. |
| Title | Transactions of RHASS Volume 1940 - Page 236 |
