LAB ( 535 )
LAB
Watch-glaffes, for evaporating minute quan-tities at a very gentle heat.
Common decanters.
A bottle for fpecific gravity of fluids.
Phials of all fizes, plain and with ground(toppers.
Plain glafs tube of various thicknefs and bore,out of which may eafily be made("Syphon tubes.
J Bent tubes for gaffes.
\ Capillary tubes, for dropping liquids, and va-^ rious other ufeful articles.
A gas-faturating apparatus.
A Woulfe’s apparatus.
A tube of fafety, feparate (Pig. 60).
A barometer.
Thermometers—common, and with the bulbnaked, to dip into liquors.
The following in Earthen-ware:
Crucibles—Heflian, common, and black-lead,of different fizes and fhapes, with Hands andcovers.
Retorts.
Retort-ftands (fuch as Fig. 25 inverted).
Cupels.
Wedgewood evaporating difhes—a fet.
"White bafons with lips, different fizes.
Common white cups and faucers.
Tubes—ftraight and bent.
Porcelain fpoons.
Ditto rods, for ftirring corrofive fluids.
Several (lone ware jars with tin covers, forholding falts, & c .
Alfo the following fundries:
Wire—different fizes and kinds, viz. iron,copper, brafs, filver, and platina.
Gold, filver, and brafs leaf—tinfoil.
Wooden tripod (lands for receivers, &c.Fire tongs—various fhapes.
Steel fpatula and pallet knives.
Diamond for fcratching glafs.
Files—flat, three-cornered,,and rat-tailed.Hammers.
A vice and anvil.
Pincers.
A magnet.
Sieves.
Filtering paper.
Corks.
Bladders —fpirit varnifh — fponge — tow —-linen—flannel.
Windfor and common bricks—tiles—fand.
Lutesof various kinds. (See articleCEMENTs.
For more extenfive and delicate refearches itit is alfo neceflary to have
A mercurial pneumatic trough.
A mercurial gazometer.
A burning lens of confiderable power.
An eledlrical apparatus.
A Galvanic apparatus.
A Detonating jar.
A glafs or filver alembic.
The fuel to be employed has been alreadymentioned under the article Furnace, and a fup-ply (hould be kept near at hand, broken downready for ufe.
With regard to the different fubflances or re-agents to be kept, the chemift will, of courfe,wifh to have a fpecimen of all the Ample or in-dividual fubflances, fuch as the acids, earths,metals, &c. but it may not be unacceptable toadd a lift of thofe fimple and compound fub-ftances which are of general ufe, and whichtherefore ought alfo to (land on the (helves.
For many purpofes the ordinary degree ofpurity in which thefe fubflances are obtainedby the common proceffes is fufficient; fo, forexample, the fmall quantity of potafh in com-mon fulphuric acid, and of iron in commonmuriatic acid, feldom interferes with any of theufes to which thofe reagents are applied ; butit is alfo neceflary frequently to have them inthe utmoft purity when employed as teds fordelicate purpofes. The chemift will thereforefind it of advantage to referve a feparate fet ofa few of the moft neceflary reagents in theirutmofl purity, and if only employed when abfo-lutely requifite, a very moderate quantity willfuflice. In the fubjoined lift we have diftin-guiftied by the word pure thofe fubflances whichrequire particular pains to be obtained abfolutelypure, and the methods of doing it will be foundunder the refpedlive articles. Mixtures of eachof the ftronger acids and water in two or threedifferent and known proportions fhould alfo bekept.
(N. B. The letter D implies that the Dry fuh-fance fjould be kept, , and S, that it Jhould be inSolution.)
Sulphuric acid, pure
Ditto common
Nitric acid, pure and boiled
Ditto common and boiledDitto fuming
Muriatic acid, pure
Ditto common-