Journal of the Franklin InstituteFranklin Institute, 1843 Vols. 1-69 include more or less complete patent reports of the U. S. Patent Office for years 1825-1859. cf. Index to v. 1-120 of the Journal, p. [415] |
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Seite 33
... acid and water , two drachms ( fzij ) of the acid to two ounces of water . 2. The one marked B , for a similar space of time , in a strong solution of caustic potassa , a powerful alkali . 3. The third , marked C , was immersed in a ...
... acid and water , two drachms ( fzij ) of the acid to two ounces of water . 2. The one marked B , for a similar space of time , in a strong solution of caustic potassa , a powerful alkali . 3. The third , marked C , was immersed in a ...
Seite 54
... acid of the salt becomes volatilized and flies off , * while the soda , which is indestructible , is converted into ... acids and their salts , as to produce a temperature approaching , and even considerably below , the freezing point on ...
... acid of the salt becomes volatilized and flies off , * while the soda , which is indestructible , is converted into ... acids and their salts , as to produce a temperature approaching , and even considerably below , the freezing point on ...
Seite 68
... acid , and its poles adjusted with charcoal points , in the manner which is customary , when an intense light is to be produced by means of this instrument . Two pictures were obtained ; one of which is made up of a blur , or spot ...
... acid , and its poles adjusted with charcoal points , in the manner which is customary , when an intense light is to be produced by means of this instrument . Two pictures were obtained ; one of which is made up of a blur , or spot ...
Seite 141
... acid , exactly neutralized with soda , and so dilute as to be not darker in color than sherry wine . Immediately the ... acid to the metallic solution intended to be precipitated . I take any convenient solution of silver , gold , or ...
... acid , exactly neutralized with soda , and so dilute as to be not darker in color than sherry wine . Immediately the ... acid to the metallic solution intended to be precipitated . I take any convenient solution of silver , gold , or ...
Seite 142
... acid need not be pure ; but cheaper liquids , containing a considerable portion of it , or of an analogous vegetable substance , may be used instead of the pure acid . With respect to this part of my invention , I claim the use of gallic ...
... acid need not be pure ; but cheaper liquids , containing a considerable portion of it , or of an analogous vegetable substance , may be used instead of the pure acid . With respect to this part of my invention , I claim the use of gallic ...
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Häufige Begriffe und Wortgruppen
acid action advantage amount appears applied average axle become body boiler calculated carriages carried cast cause cent Clear Cloudy color common compared consequence considerable considered construction contained continued copper cost course diameter direction distance earth effect employed engines equal exhibited expense experiments fact feet force four friction give given greater ground half heat important inches increase iron laid lead length less light load machine manner material means metal mile minute mode motion moulding nearly necessary object observed obtained passed pattern pavements Philadelphia piece plate practice present pressure produced proportion quantity rails railway reference remark resistance road sand side square steam stone sufficient supposed surface taken thickness tion wall weight wheels whole yard
Beliebte Passagen
Seite 206 - ... necessary for their preservation, and in such manner as shall be conducive to a beneficial and favorable display thereof, the models and specimens of compositions and of...
Seite 354 - If it is discontinued, provided it has been once in public use, and the recollection of it has not been altogether lost — if it has been once publicly used, it will be sufficient to invalidate the letters patent, although the use may be discontinued at the time when the patent was granted.
Seite 185 - Experiments and observations made with the view of improving the art of composing and applying calcareous cements...
Seite 285 - I conceive, right to add, that in all cases, even though the composition of the water seems to bring it within the conditions of safety now stated, an attentive examination should be made of the water after it has been running for a few days through the pipes ; for it is not improbable that other circumstances, besides those hitherto ascertained, may regulate the preventive influence of the neutral salts.
Seite 318 - Scotland, for his Invention of certain improvements in the means and machinery for deepening and excavating the beds of rivers, removing sandbanks, bars, and other obstructions to navigation.
Seite 145 - The Committee on Science and the Arts constituted by the Franklin Institute of the State of Pennsylvania, for the promotion of the Mechanic Arts, to whom was referred for examination a Solar Compass, invented by WM.
Seite 136 - ... will prevent the metal from running away, and in a few minutes it will cool and take the impression, without the slightest injury to the paper from which it was taken.
Seite 28 - ... of an engineer, in regard to some of the general principles. He should accommodate a new line of road to local circumstances, so far as could be without superseding public advantages. It would be ridiculous to follow the old Roman fashion, on the mathematical axiom that a straight line is the shortest that can be drawn between two points. This would not make the most commodious road — hills must be avoided, towns must be resorted to, and the sudden bends of rivers must be shunned. It is not...
Seite 206 - And be it further enacted. That it shall be the duty of the Commissioner to cause to be classified and arranged, in such rooms or galleries as may be provided for that purpose, in suitable cases, when necessary for their preservation, and in such manner as shall be conducive to a beneficial and favorable display thereof...
Seite 355 - ... by sixteen iron screws four and a half inches in diameter. This platform has several shores on its surface, which were brought to bear equally on the vessel's bottom, to prevent her from canting over on being raised out of the water. About thirty men...