Repertory of Arts, Manufactures, and Agriculture: Consisting of Original Communications, Specifications of Patent Inventions ..., Band 3G. and T. Wilkie, 1844 |
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Seite 47
... calotype pictures impedes the process of taking copies from them , in order to remedy this defect I plunge the calotype picture into a hot bath of hyposulphite of soda ( or any other soluble hypo- sulphite ) dissolved in about ten times ...
... calotype pictures impedes the process of taking copies from them , in order to remedy this defect I plunge the calotype picture into a hot bath of hyposulphite of soda ( or any other soluble hypo- sulphite ) dissolved in about ten times ...
Seite 48
... calotype paper prepared in the ordinary way , that is , with equal proportions of gallic acid and nitrate of silver . But since there is some diffi- culty in making the ordinary calotype paper quite dry , without spoiling it more or ...
... calotype paper prepared in the ordinary way , that is , with equal proportions of gallic acid and nitrate of silver . But since there is some diffi- culty in making the ordinary calotype paper quite dry , without spoiling it more or ...
Seite 52
... calotype paper ; I shall therefore class them together , and designate either of them by the term negative . The negative being prepared , it is now required to obtain from it the desired number of positive copies . For this purpose the ...
... calotype paper ; I shall therefore class them together , and designate either of them by the term negative . The negative being prepared , it is now required to obtain from it the desired number of positive copies . For this purpose the ...
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annealing apparatus applied arrangement axis bars calotype capstan cards carriage claim colour combined construction County of Middlesex cylinder described the nature drawing employed Engineer ENGRAVING Enrolled fabrics Fahrenheit fatty or oily February 24 fibrous figures flyer frame Gentleman glass guard plate heat hollow screw plug improvements in machinery india rubber invention consists invention relates iron Learned Friend letters patent machine magnesia mandril manner manufacture material means metal Middlesex mode months mould nitrous nitrous acid November 25 obtained oily bodies operation palm oil passing Patent for Improvements Patent granted pipe piston placed plaintiff plane presents produced pump punches purpose quantity Rubery screw threads Sealed shaft sheet shewn shown side sieves solution specification spindle steam stearic acid substance suitable sulphuric acid surface tallow thereof threads tion top-tips tubes understood upper valve vessel wheels WILLIAM witness whereof workman yarn