The Popular Science Review: A Quarterly Miscellany of Entertaining and Instructive Articles on Scientific Subjects, 2권James Samuelson, Henry Lawson, William Sweetland Dallas Robert Hardwicke, 1863 |
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38 페이지
... silver) " have been precipitated, a sufficient quantity of precipitating hqnor be added, in order to redissolve them ... silver, with the aid of a separate electric current, before he met with the above passage. Ho then took a solution ...
... silver) " have been precipitated, a sufficient quantity of precipitating hqnor be added, in order to redissolve them ... silver, with the aid of a separate electric current, before he met with the above passage. Ho then took a solution ...
37 페이지
... silver electro - plating in the early period of its development . In the year 1838 , Messrs . G. R. & H. Elkington were engaged , commercially , in coating military and other metal ornaments with gold and silver , by immersing them in ...
... silver electro - plating in the early period of its development . In the year 1838 , Messrs . G. R. & H. Elkington were engaged , commercially , in coating military and other metal ornaments with gold and silver , by immersing them in ...
38 페이지
... silver , and copper , it says , that " if after these calces " ( i . c . , the cyanides or ferrocyanides of gold and silver ) " have been precipitated , a sufficient quantity of precipitating liquor be added , in order to redissolve ...
... silver , and copper , it says , that " if after these calces " ( i . c . , the cyanides or ferrocyanides of gold and silver ) " have been precipitated , a sufficient quantity of precipitating liquor be added , in order to redissolve ...
39 페이지
... silver solution was employed hot ; now it is always used cold . Nickel silver was always the substance employed as a base for receiv- ing the deposit from the earliest period of electro - silver - plating , or at least soon after the ...
... silver solution was employed hot ; now it is always used cold . Nickel silver was always the substance employed as a base for receiv- ing the deposit from the earliest period of electro - silver - plating , or at least soon after the ...
40 페이지
... silver was particularly apt to occur with articles made of Britannia metal , and with this particular alloy it was ... silver upon the article , by a powerful battery , in a solution containing but little cyanide of silver and much ...
... silver was particularly apt to occur with articles made of Britannia metal , and with this particular alloy it was ... silver upon the article , by a powerful battery , in a solution containing but little cyanide of silver and much ...
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acid ammonia amongst animal appears beautiful birds body bones branches British carbon carbonic acid cause chemical chloroform ciliary processes colour consists contains copper cornea curious cyanide deposit described diameter effect electric employed engine examined exhibited existence experiments fact feet fibres flower Fungi Geology glass heat hymenium Illustrated important inches interesting iron known leaves light lion manufacture matter means metal microscope mineral minute mistletoe nature nitrous oxide object observations obtained ordinary organic P. L. Simmonds paper papillæ passed peculiar pileus plants Polypide Polyzoa portion possess present produced Professor quantity readers remarkable retina rock scientific seen silver skin Society solution species specimens stars statoblasts steam structure strychnia substance sulphur sulphuric acid surface telescope temperature thallium tion tree tube various vegetable vessel VINEGAR EEL whilst winter wood zinc
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393 페이지 - There is grandeur in this view of life, with its several powers, having been originally breathed by the Creator into a few forms or into one; and that, whilst this planet has gone cycling on according to the fixed law of gravity, from so simple a beginning endless forms most beautiful and most wonderful have been, and are being evolved.
341 페이지 - In thoughts from the visions of the night, when deep sleep falleth on men, Fear came upon me, and trembling, which made all my bones to shake. Then a spirit passed before my face ; the hair of my flesh stood up...
99 페이지 - How gloriously her gallant course she goes! Her white wings flying — never from her foes — She walks the waters like a thing of life, And seems to dare the elements to strife.
392 페이지 - Authors of the highest eminence seem to be fully satisfied with the view that each species has been independently created. To my mind it accords better with what we know of the laws impressed on matter by the Creator, that the production and extinction of the past and present inhabitants of the world should have been due to secondary causes, like those determining the birth and death of the individual.
392 페이지 - I believe that animals are descended from at most only four or five progenitors, and plants from an equal or lesser number.
392 페이지 - Therefore I should infer from analogy that probably all the organic beings which have ever lived on this earth, have descended from some one primordial form, into which life was first breathed.
21 페이지 - As nitrous oxide in its extensive operation appears capable of destroying physical pain, it may probably be used with advantage during surgical operations in which no great effusion of blood takes place.
496 페이지 - That, for instance, in acquiring the sensation of redness, our eyes are affected four hundred and eighty-two millions of millions of times ; of yellowness, five hundred and forty-two millions of millions of times ; and of violet, seven hundred and seven millions of millions of times per second...
346 페이지 - Trees having this character of wood are rare, and do not exist in the proportion of one to a hundred. The serpentine direction of the fibre, which renders them difficult to split and to work, produces, in the hands of a skilful mechanic, the most beautiful effects of light and shade. These effects are rendered more striking, if, after smoothing the surface of the wood with a double-ironed plane, it is rubbed with a little sulphuric acid, and afterwards anointed with linseed oil.
200 페이지 - Great fleas have little fleas upon their backs to bite 'em, And little fleas have lesser fleas, and so ad infinitum.