Instructions for Observing the Transit of Venus December 6 1882
Instructions for Observing the Transit of Venus December 6 1882
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The following formula is recommended : Bromo- iodized collodion.
m Alcohol - 10 fluid ounces.
Ether 10 fluid ounces.
Iodide ammonium 40 grains.
Iodide cadmium 60 grains.
Bromide ammonium 20 grains.
At least three silver baths will be required. They should contain 40 grains of nitrate of silver to the ounce of water, and enough nitric acid to redden blue litmus paper slowly. On removing the plates from the bath drain them as thoroughly as is consistent with rapid work, and wipe their backs. Deve...lop with: Protosulphate of iron 1 ouncfe.
Acetic acid No. 8- 1 fluid ounces.
Water - - - - - 20 fluid ounces.
These proportions may be varied, however, if it is found advisable to change them. Fix with solution of cyanide of potassium of such strength as to clear the film rather quickly.
The instructions already given for the manipulation of dry-plates will be followed so far as they are applicable. If bath wet plates have been exposed in the photo- heHograph, the plate-frame must be thoroughly cleansed from all traces of nitrate of silver before dry-plates are put into it.
What to read after Instructions for Observing the Transit of Venus December 6 1882?
You can find similar books in the "Read Also" column, or choose other free books by 1882 United States Commission On the Transit of Venus to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
The following formula is recommended : Bromo- iodized collodion.
m Alcohol - 10 fluid ounces.
Ether 10 fluid ounces.
Iodide ammonium 40 grains.
Iodide cadmium 60 grains.
Bromide ammonium 20 grains.
At least three silver baths will be required. They should contain 40 grains of nitrate of silver to the ounce of water, and enough nitric acid to redden blue litmus paper slowly. On removing the plates from the bath drain them as thoroughly as is consistent with rapid work, and wipe their backs. Deve...lop with: Protosulphate of iron 1 ouncfe.
Acetic acid No. 8- 1 fluid ounces.
Water - - - - - 20 fluid ounces.
These proportions may be varied, however, if it is found advisable to change them. Fix with solution of cyanide of potassium of such strength as to clear the film rather quickly.
The instructions already given for the manipulation of dry-plates will be followed so far as they are applicable. If bath wet plates have been exposed in the photo- heHograph, the plate-frame must be thoroughly cleansed from all traces of nitrate of silver before dry-plates are put into it.
What to read after Instructions for Observing the Transit of Venus December 6 1882?
You can find similar books in the "Read Also" column, or choose other free books by 1882 United States Commission On the Transit of Venus to read onlineMoreLess
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