Bulletin - Bureau of Chemistry, Τεύχη 20-29U.S. Government Printing Office, 1889 |
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Αποτελέσματα 1 - 5 από τα 78.
Σελίδα 21
... solution , filtered solution evaporated to 200 cubic centimeters , heated three hours with 15 cubic centimeters HCl . 1.15 specific gravity , and sugar de- termined in this solution . This method gave several per cent . less starch than ...
... solution , filtered solution evaporated to 200 cubic centimeters , heated three hours with 15 cubic centimeters HCl . 1.15 specific gravity , and sugar de- termined in this solution . This method gave several per cent . less starch than ...
Σελίδα 44
... solution of gelatine are added , the whole heated at about 80 ° to 90 ° , and titrated with a solution of ammonium molybdate until no further precipitation occurs . The mixture is constantly shaken during titration , and from time to ...
... solution of gelatine are added , the whole heated at about 80 ° to 90 ° , and titrated with a solution of ammonium molybdate until no further precipitation occurs . The mixture is constantly shaken during titration , and from time to ...
Σελίδα 45
... solution of hydro- gen sulphide , the mass of the precipitate treated in the same manner , and well shaken with the saturated hydrogen sulphide solution ; the clear liquid is filtered and the residue treated with hydrogen sulphide ...
... solution of hydro- gen sulphide , the mass of the precipitate treated in the same manner , and well shaken with the saturated hydrogen sulphide solution ; the clear liquid is filtered and the residue treated with hydrogen sulphide ...
Σελίδα 46
... solution ( Werenskjold ) . The re agent used is prepared by dissolving 300 grams of ammonium molybdate to 1 liter , add- ing half a liter of 50 per cent . citric acid solution , heating , adding half a liter of nitric acid ( 1.4 ) ...
... solution ( Werenskjold ) . The re agent used is prepared by dissolving 300 grams of ammonium molybdate to 1 liter , add- ing half a liter of 50 per cent . citric acid solution , heating , adding half a liter of nitric acid ( 1.4 ) ...
Σελίδα 62
... solution was neutral . He found it a matter of no small difficulty to determine just when the ammonium citrate solution was neutral . Indeed , the use of litmus paper and of coralline would give results not concordant . The coralline ...
... solution was neutral . He found it a matter of no small difficulty to determine just when the ammonium citrate solution was neutral . Indeed , the use of litmus paper and of coralline would give results not concordant . The coralline ...
Άλλες εκδόσεις - Προβολή όλων
Bulletin - Bureau of Chemistry, Τεύχη 125-134 United States. Bureau of Chemistry Πλήρης προβολή - 1909 |
Bulletin - Bureau of Chemistry, Τεύχη 110-115 United States. Bureau of Chemistry Πλήρης προβολή - 1908 |
Συχνά εμφανιζόμενοι όροι και φράσεις
acre adulteration Agriculture alcohol alkali amount analyses apparatus average beets boiling Brix butter cane carbonate cells cent chemical chemists clarified contained Conway Springs crop cubic centimeters cultivation culture determination diffusion battery diffusion juice dilution distillation Early Amber Early Orange ether evaporation exhausted chips Experiment Station extraction factory fertilizers filter flask Glucose grams grown heated improved inches inversion Kansas kilograms Kjeldahl method lime loss manufacture manure massecuite means method milk mill juice molasses nitrate nitric acid nitrogen normal juice obtained October percentage phosphoric acid plant plots plowing polariscope potash pounds produced pulp purity quantity roots samples saponification season Second sugar seed selection Sept September sirup soda soil solution sorghum specific gravity substance sucrose sugar-beet sugar-house sulphuric acid superphosphate temperature tion tons Total solids tube varieties volatile acids washing weight Wiley yield
Δημοφιλή αποσπάσματα
Σελίδα 77 - ... artificial, with experiments designed to test their comparative effects on crops of different kinds; the adaptation and value of grasses and forage plants; the composition and digestibility of the different kinds of food for domestic animals; the scientific and economic questions involved in the production of butter and cheese; and such other researches or experiments bearing directly on the agricultural industry of the United States as may in each case be deemed advisable, having due regard...
Σελίδα 76 - AN ACT To establish agricultural experiment stations In connection with the colleges established In the several States under the provisions of an act approved July second, eighteen hundred and sixty-two, and of the acts supplementary thereto...
Σελίδα 77 - That it shall be the object and duty of said experiment stations to conduct original researches or verify experiments on the physiology of plants and animals; the diseases to which they are severally subject, with...
Σελίδα 220 - ... avoiding the useless saturation of the caustic potash solution. When the flow of carbonic acid has very nearly or completely ceased, pass the delivery tube down into the receiving arm, so that the bubbles will escape into the azotometer. Light the jets under the...
Σελίδα 7 - Report on the culture of the sugar beet and the manufacture of sugar therefrom in France and the United States.
Σελίδα 42 - This fat will not usually be clear; this 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.
Σελίδα 72 - Vilmorin is manufactured in connection with other varieties it is the custom to reserve this for the end of the season and to work up the less reliable beets at an earlier date. It is also said to resist better than any other variety the unfavorable influence of certain characters of soil and of certain manures. In black soils, rich in organic matter, it will give great industrial results, while most other varieties of beets become watery or saline in excess.
Σελίδα 222 - If the mixture froth badly, a small piece of paraffin may be added to prevent it. The heat is then raised until the acid boils briskly. No further attention is required till the contents of the flask have become a clear liquid, which is colorless, or at least has only a very pale straw color.
Σελίδα 42 - 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...
Σελίδα 44 - ... 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 accurate reading is desired it may be obtained by taking four samples of the milk in four test bottles, and after treating them in...