Employment for the microscope ... I. An examination of salts and saline substances ... also ... considerations on gems, poisons ... and ... other subjects. II. An account of various animalcules ... and ... other ... discoveries ... Likewise a description of the microscope used / In two parts : illustrated with seventeen copper plates by Henry Baker.

  • Henry Baker
Date:
1753
Catalogue details

Licence: Public Domain Mark

Credit: Employment for the microscope ... I. An examination of salts and saline substances ... also ... considerations on gems, poisons ... and ... other subjects. II. An account of various animalcules ... and ... other ... discoveries ... Likewise a description of the microscope used / In two parts : illustrated with seventeen copper plates by Henry Baker. Source: Wellcome Collection.

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    of an Ounce, and fufficiently large for them to go eafily in and out. Such a Board will conveniently admit of twelve Rows, each Row having eight Holes. Being thus furnifhed with a Repofitory for your Collection, and provided with ninety-fix Phials of clear Glafs to place in thefe Holes, where they will Hand in order without Danger of tumbling down or be¬ ing otherwife difplaced, put into each Phial as much of any Salt or faline Subfiance, reduced to Powder, as you are certain will be fufficient to faturate about half the Quantity of Water it can contain ; for ’tis beft to prepare no more at once, as thereby you will leave room for making Mixtures and trying Experiments, which if the Bottles are quite full you cannot do fo welh Then with a Tea-fpoon, half fill your Phials with boiling Water, immerging them all the while up to the Neck in a Bafon of Water, like wife boiling hot ■f*, and hold them there till the Salt is all diffolved, or you are fure the Water will diffolve no more. This done, fallen with fiiff Pafte a fmall Piece of Paper on the Side of each Phial near the Neck, that it may eafily be feen ; having previoully marked the Papers 1,2, 3, 4, 5, &c. in a numerical Order. Fit D the f Cold Water or warm Water will do for fome fcrts, but ]hot \Vater does no Harm to any, and is beft for moil,
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