A Treatise on Pharmacy for Students and PharmacistsLea, 1906 - 834 pages |
From inside the book
Results 1-5 of 90
Page 78
... effected , for the purpose of keeping up the expansion . Active or sensible heat may be meas- ured by its effect on mercury , upon which latent heat makes no impression ; the latter can be converted into the former , however , by ...
... effected , for the purpose of keeping up the expansion . Active or sensible heat may be meas- ured by its effect on mercury , upon which latent heat makes no impression ; the latter can be converted into the former , however , by ...
Page 79
... effected ; but the intensity of heat is dependent upon the rapidity of combustion ; therefore , the finer the division of the fuel , the more rapidly will it be burned or oxidized , and consequently the greater will be the degree of ...
... effected ; but the intensity of heat is dependent upon the rapidity of combustion ; therefore , the finer the division of the fuel , the more rapidly will it be burned or oxidized , and consequently the greater will be the degree of ...
Page 82
... effected . One drawback to the majority of Bunsen burners in the market is the tendency to " light back " -that is , when the flame is reduced , it is apt to recede and ignite the gas at the pinhole orifice in the tube ; the most ...
... effected . One drawback to the majority of Bunsen burners in the market is the tendency to " light back " -that is , when the flame is reduced , it is apt to recede and ignite the gas at the pinhole orifice in the tube ; the most ...
Page 85
... effected , as shown by the pale - blue flame , which can be turned down very low without flick- " " Jewel gas stove . FIG . 63 . FIG . 64 . Reichert's thermostat The Bunsen - Kemp gas regulator or thermostat . ering . It consumes about ...
... effected , as shown by the pale - blue flame , which can be turned down very low without flick- " " Jewel gas stove . FIG . 63 . FIG . 64 . Reichert's thermostat The Bunsen - Kemp gas regulator or thermostat . ering . It consumes about ...
Page 86
... effected by means of the Hofmann screw compressor ( see Fig . 65 ) . The supply of gas being turned on full at the key and the screw having been slipped over the rubber tubing , the latter is compressed until the desired temperature is ...
... effected by means of the Hofmann screw compressor ( see Fig . 65 ) . The supply of gas being turned on full at the key and the screw having been slipped over the rubber tubing , the latter is compressed until the desired temperature is ...
Common terms and phrases
acacia acetic acid added alkali alkaloids ammonia ammonia water ammonium aqueous solution assay bicarbonate bismuth boiling bottles bromide calcium camphor cent chemical chloride chloroform color compound condenser containing cool crystals decomposition dioxide dissolved distilled water dried drug emulsion ether evaporation extract ferric ferrous filter filtrate flask fluid fluidextract fluidounce glass glycerin grains H₂O heat hence hydrochloric acid insoluble iodide iodine iron known latter lime liquid mass menstruum mercuric metallic mixed mixture morphine mucilage neutral nitrate nitric acid obtained odor ointment opium oxide percolator pharmacists Pharmacopoeia requires phosphate pills potassium carbonate potassium hydroxide potassium iodide powder precipitated preparation present pure purified quinine reaction readily residue resin salicylate salt separator sodium carbonate sodium hydroxide solu soluble solvent specific gravity starch substances sugar sulphate sulphuric acid syrup temperature tincture tion triturated tube volatile oils volume washed water of crystallization water-bath weight yield zinc
Popular passages
Page 68 - ... the ratio of the ovendry weight of a sample to the weight of a volume of water equal to the volume of the sample at some specific moisture content, as green, air-dry, or ovendry.
Page 133 - ... cylindrical or only slightly tapering percolator may be used for drugs which are not liable to swell, and when the menstruum is strongly alcoholic, or when ether or some other volatile liquid is used for extraction. The size of the percolator selected should be in proportion to the quantity of drug extracted. When properly packed in the percolator, the drug should not occupy more than two-thirds of its height. The percolator is best constructed of glass or stoneware, but, unless otherwise directed,...
Page 28 - The system is built on a foundation of seven basic units, and all other units are derived from them. (Use of metric weights and measures was legalized in the United States in 1866, and our customary units of weights and measures are defined in terms of the meter and kilogram.) Length. Meter.
Page 779 - Remove the stopper carefully, and, should any crystals adhere to it, brush them into the flask. Place in a small funnel two rapidly acting filters, of a diameter of 7 Cm., plainly folded, one within the other (the triple fold of the inner filter being laid against the single side of the outer filter), wet them well with ether, and decant the ethereal solution as completely as possible upon the inner filter. Add 10 Cc. of ether to the contents of the flask, rotate it, and again decant the ethereal...
Page 235 - An ordinary infusion, the strength of which is not directed by the physician nor specified by the Pharmacopoeia, shall be prepared by the following formula : Take of the substance, coarsely •comminuted, 50 Gm.
Page 439 - Glycerin, or if a miscible liquid, with a little Water, and add sufficient Glycerin to make the weight of the mixture one-half that of the finished mass. Then thoroughly incorporate it with an equal weight of melted Glycerinated Gelatin, and pour it at once into suitable moulds which have been greased with a small quantity of petrolatum.
Page 143 - Squibb, who. was the author of the process, defined it to be "the successive application of the same percolating menstruum to fresh portions of the substance to be percolated." His suggestion was based upon the observation that a weak solution of the constituents of a drug is a better solvent for the soluble active principles of that drug than fresh menstruum. The following example will serve to illustrate the process of repercolation : 1000 Gm.
Page 140 - ... throughout the text is understood to mean a rate of flow corresponding to this ; it is evident that the proper rate of flow should vary with the quantity and character of the drug employed and the density of the menstruum. Maceration. — Percolation is not suitable for exhausting some drugs, and the process of maceration is employed for some of the tinctures (Aloes, Asafetida, Sweet Orange Peel, Tolu, etc.).
Page 778 - ... minutes, and return the whole to the filter. When the liquid has drained off, wash the residue, as before, until the second filtrate measures 150 cc, and finally collect about 20 cc more of a third filtrate. Evaporate...
Page 686 - Pharmacopoeia to contain not less than 85 per cent, of benzaldehyde and not less than 2 per cent, nor more than 4 per cent, of hydrocyanic acid.