Annual Report of the Agricultural Experiment Station of the University of Wisconsin for the Year ..., Volum 7Democrat Print. Company, State printers, 1890 |
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Frases i termes més freqüents
acid amount of water apple scab average barley barn Beauty of Hebron bone meal bran Bunn bushels butter butter fat capillary action cent chanta clay loam clover cold water corn fodder corn meal cows cream crude protein December 13 difference dry matter experiment Extremely vigorous Farmer fat globules feed fodder corn gain germination Hebron hogs inches Indian corn July July 16 June June 21 lambs Lb Oz Lb Lb Oz Oz live weight loam loss of dry Mattie milk fat milk yield Moderately vigorous Oz Lb Oz period pigs plants potatoes pounds quantity ration reported Roan rolled ground rows samples Sept shocks silage silo six cows spoilt ensilage Station surface Table showing tank Total solids trial tubers unrolled ground varieties warm water water content water drank Water in soil weaning
Passatges populars
Pàgina 106 - This fat will not usually be clear; thi& however, will make no difference in the result, as the subsequent treatment will clarify it. As soon as the bottles have been sufficiently whirled, they should be filled to the neck with hot water. This is most conveniently done by placing a vessel containing boiling water above the machine, and by means of a syphon, made from a small rubber tube with a glass tip, run the water directly into the bottles -without removing them from the wheel. The flow of water...
Pàgina 108 - ... divisions which mark the highest and lowest limits of the fat. The difference between these gives the per cent, of fat directly. The reading can easily be taken to half divisions or to one-tenth per cent. If the column of fat is less than about one division, as will sometimes happen with skimmilk, buttermilk or whey it may assume a globular form instead of a uniform layer across the tube; when this occurs the fat can usually be estimated with sufficient accuracy by simple inspection, but if an...
Pàgina 105 - ... milk. The acid being much heavier than milk sinks directly to the bottom of the test bottle without mixing with the milk that floats upon it. The acid and milk should be thoroughly mixed together by gently shaking with a rotary motion. At first there is a precipitation of curd from the milk, but this rapidly dissolves. There is a large amount of heat evolved by the chemical action, and the solution, at first nearly colorless, soon changes to a very dark brown, owing to the charring of the' milk...
Pàgina 105 - The test bottles containing the mixture of the milk and acid should be placed in the machine, and whirled directly after the acid is added. An even number of bottles should be whirled at the same time, and they should be placed in the wheel in pairs opposite to each other, so that the equilibrium of the apparatus will not be disturbed. When all of the test bottles are placed in the apparatus, the cover is placed upon the jacket, and the machine turned at the proper speed for about five minutes.
Pàgina 104 - ... should be poured once from one vessel to another after each sample is measured. Neglect of this precaution may make a perceptible difference in the results, through the separation of cream, especially when the milk examined is rich. Persons who have had no experience in the use of the pipette will do well to practice a short time by measuring water into a test ^bottle before attempting to make an analysis.
Pàgina 196 - ... diameter. After labeling the trees in accordance with our arranged plan, two of them were sprayed with a solution of potassium sulphide at the rate of half an ounce to a gallon of water; two others, with a solution of soda hyposulphite at the rate of one pound to ten gallons of water, a third pair was sprayed with water containing in partial suspension a " sulphur compound," formed by slacking lime to which a certain proportion of sulphur had been previously added.
Pàgina 108 - The chief difficulty in testing cream lies in the sampling. Cream that is sour, or that has been exposed to the air until the 'urface has dried, can not be accurately sampled. The same is true of centrifugal cream that is badly frothed. Sweet cream from Cooley cans, that is not too thick to flow readily from the pipette, may be tested with satisfactory results. The process, however, must be modified slightly...
Pàgina 99 - This may be of any form, but that shown in fig. 2, with a rather wide opening at the lower end to allow the milk to run out rapidly is to be preferred. It should contain when filled to the mark, 17.6 cc A pipette of this size will deliver a little less than 17.5 cc of milk.
Pàgina 109 - If 17.6 cc of cream is taken and the portion adhering to the pipette is rinsed into the test bottle, a close approximation of the true result may be obtained without weighing by correcting the scale reading as follows: For a scale reading of 20 per cent. , add . 25 per cent. ; for a scale reading of 15 per cent., add 0.1 per cent. Readings between these may be corrected in proportion. Below 10 per cent, no correction is necessary.
Pàgina 103 - ... and sucking at the upper end until the milk rises above the mark on the stem; then remove the pipette from the mouth and quickly close the tube at the upper end by firmly pressing the end of the index finger upon it to prevent access of air; so long as this is done the milk cannot flow from the pipette.