The Chemical News and Journal of Physical Science, Volúmenes31-32Griffin, Bohn and Company, 1775 |
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Página 16
... soda solution into the flask ; the latter was then boiled into the former . After a few minutes ebullition there was a gradual change in the coloured liquid . It became purple , then blue , and there was thus seen to be manifestly ...
... soda solution into the flask ; the latter was then boiled into the former . After a few minutes ebullition there was a gradual change in the coloured liquid . It became purple , then blue , and there was thus seen to be manifestly ...
Página 21
... soda , and is heated to 100 ° for some hours . Into the cold liquid is poured a volume of normal solution of sulphuric acid ex : actly equal to that of the alkaline solution employed . It is then filtered , the vessel and filter are ...
... soda , and is heated to 100 ° for some hours . Into the cold liquid is poured a volume of normal solution of sulphuric acid ex : actly equal to that of the alkaline solution employed . It is then filtered , the vessel and filter are ...
Página 22
... soda , yielding bisulphite of soda , which , when treated with zinc , yields the " hydrosulphite " now used in indigo dyeing . Alcoholic Yeast . - This substance when dried can endure for some hours a temperature of 100 ° , and for a ...
... soda , yielding bisulphite of soda , which , when treated with zinc , yields the " hydrosulphite " now used in indigo dyeing . Alcoholic Yeast . - This substance when dried can endure for some hours a temperature of 100 ° , and for a ...
Página 30
... soda- ash liquor until it is free from any sour taste ; then put on the filters for six days . It should weigh 100 lbs . when it comes off . That is free extract of indigo of commerce . -I am , & c . , BRADFORD . CHEMICAL NOTICES FROM ...
... soda- ash liquor until it is free from any sour taste ; then put on the filters for six days . It should weigh 100 lbs . when it comes off . That is free extract of indigo of commerce . -I am , & c . , BRADFORD . CHEMICAL NOTICES FROM ...
Página 32
... soda or potash . The product neutralised as described is then heated along with caustic soda or potash as long as a bluish or red colour is produced . From this product a precipitate of alizarin and isopurpurin is obtained on the ...
... soda or potash . The product neutralised as described is then heated along with caustic soda or potash as long as a bluish or red colour is produced . From this product a precipitate of alizarin and isopurpurin is obtained on the ...
Otras ediciones - Ver todas
Términos y frases comunes
acetic acid action adulterated alcohol aldehyd alkali alum alumina ammonia amount analysis aniline anthracen apparatus appears applied baryta Bill body boiling calcium carbonic acid cent CHEMICAL chemist Chemistry chloride chromic acid chrysene clause colour compound containing copper crystalline crystals decomposed decomposition dilute dissolved distilled ether evaporation experiments filter filtrate gases give glass heat hydrate hydrochloric acid hydrogen Improvements insoluble iodide iron liquid London magnesia magnetic manufacture matter mercury metallic method methyl milk mineral mixed mixture nitrate nitric acid nitrogen obtained ordinary oxalate oxide oxygen paper patent phosphate phosphate of lime phosphoric acid plane platinum potash potassium powder precipitate present produced proportion Public Analysts pure pyrites quantity residue salts sample sesquioxide silicates silver Society sodium solid soluble solution substance sugar sulphate sulphide sulphuric acid tartaric tartaric acid temperature tion tube washed weight whilst wine zinc
Pasajes populares
Página 232 - No person shall, with the intent that the same may be sold in its altered state without notice, abstract from an article of food any part of it so as to affect injuriously its quality, substance, or nature...
Página 48 - Where any matter or ingredient not injurious to health has been added to the food or drug because the same is required for the production or preparation thereof as an article of commerce, in a state fit for carriage or consumption, and not fraudulently to increase the bulk, weight, or measure of the food or drug, or conceal the inferior quality thereof...
Página 89 - The person purchasing any article with the intention of submitting the same to analysis shall, after the purchase shall have been completed, notify to the seller or his agent selling the article his intention to have the same analysed by the Public Analyst, and shall offer to divide the article into three parts to be then and there separated, and each part to be marked and sealed, or fastened up in such manner as its nature will permit, and shall, if required to do so, deliver one of the parts to...
Página 123 - No person shall sell to the prejudice of the purchaser any article of food or any drug which is not of the nature, substance, and quality of the article demanded by such purchaser...
Página 286 - Introduction to Experimental Physics, Theoretical and Practical ; including Directions for Constructing Physical Apparatus and for Making Experiments.
Página 233 - ... to that effect, that he had no reason to believe at the time when he sold it that the article was otherwise, and that he sold it in the same state as when he purchased it...
Página 90 - If any such officer, inspector, or constable, as above described, shall apply to purchase any article of food or any drug exposed to sale, or on sale by retail on any premises or in any shop or stores, and shall tender the price for the quantity which he shall require for the purpose of analysis, not being more than shall be reasonably requisite...
Página 254 - No person shall, except for the purpose of compounding as hereinafter described, mix, colour, stain, or powder, or order or permit any other person to mix, colour, stain, or powder, any drug with any ingredient or material so as to affect injuriously the quality or potency of such drug, with intent that the same may be sold in that state...
Página 48 - Provided that no person shall be liable to be convicted under either of the two last foregoing sections of this Act in respect of the sale of any article of food or of any drug, if he shows to the satisfaction of the...
Página 89 - London and the liberties thereof, and in the rest of the metropolis by any rates or funds applicable to the purposes of the Act for the better local management of the metropolis, and...