...hours. In this state the picture is to be very thoroughly rinsed and soaked in pure warm water, ana then dried. It is then to be well ironed with a smooth...copper-plate * So commonly called, and sold as such, hut their chemical names would be ferro-tartrate and ferrocitrate of ammonia. 302 INFLUENCE ОГ LIGHT...

...between the leaves of a book, especially in a moist atmosphere, by extremely slow degrees this dingiuess disappears, and the picture disengages itself with...ferro-tartrate and ferrocitrate of ammonia. INFLUENCE Or T.trillT OV f'lIEMfOAT. COMPOUNDS. engraving on a paper more or less tinted with pale yellow. The...

...following process: — A bath being prepared by pouring a small quantity of solution of perm'trate of mercury into a large quantity of water, and letting...and clearness, and acquires the exact effect of a copper plate engraving on a paper more or less tinted with pale yellow. I ought to observe, that the...

...the action, and it is often complete in a few hours. In this state the print is very thoroughly to be rinsed and soaked in pure warm water, and then dried....increasing sharpness and clearness, and acquires the rxact effect of a copper-plate engraving on a paper more or less tinted with pale yellow. I ought to...

...very thoroughly rinsed and soaked in pure warm water, and then dried. It is then to be well-ironed with a smooth iron, heated so as barely not to injure...clearness, and acquires the exact effect of a copper-plate engraving on a paper more or less tinted with pale yellow. I ought to observe, that the best and most...

...to injure the paper, placing it, for greater security against scorching, between clean smooth paper. If then the process have been successful, a perfectly...clearness, and acquires the exact effect of a copper-plate engraving on a paper more or less tinted with a pale yellow. I ought to observe, that the best and...

...placing it, for better security against scorching, between smooth clean papers. If then the process has been successful, a perfectly black positive picture...clearness, and acquires the exact effect of a copper-plate engraving on a paper more or less tinted with pale-yellow. I ought to observe, that the best and most...

...and repeatedly clearing off the air-bubbles), and allowed to remain till the picture (if any where visible) is entirely destroyed, or if faded, till...clearness, and acquires the exact effect of a copper-plate engraving on a paper more or less tinted with pale yellow. the same action of the light, of either...

...and repeatedly clearing off the air-bubbles), and allowed to remain till the picture (if any where visible) is entirely destroyed, or if faded, till...clearness, and acquires the exact effect of a copper-plate engraving on a paper more or less tinted with pale yellow. " I ought to observe, that the best and...

...subside, the picture must be immersed in it (carefully and repeatedly clearing off the airbubbles) and allowed to remain till the picture (if anywhere...clearness, and acquires the exact effect of a copperplate engraving on a paper more or less tinted with pale yellow. " I ought to observe, that the best and...