About chemical solutions used in photography, and problems produced by impurities in photographic paper.
About chemical solutions used in photography, and problems produced by impurities in photographic paper.
Was very pleased with the specimen JH sent him; it is still in good condition. Has he read [John William] Draper's paper? Comments on some of the points. Outlines some of his own proposed experiments.
Asks for advice on a number of scientific papers.
Much indebted for his paper on the influence of the solar spectrum on vegetable colors. Has a series of experiments ready that he hopes will resolve some of his own doubts. Does not like the term J. W. Draper uses for the new rays.
Papers arrived safely. Will report GD's opinion on these soon.
Thanks JH for a specimen of 'mercury type,' which AS describes as he examined it under a microscope.
Discusses matter touching P.M. and Scientific Memoirs.
Sees too many difficulties in optics of JH's proposed telescope. Can build mechanical portion, but not by March as JH requires. Cannot give estimate, because design is too novel.
Sends a few samples of plates made by the cyanotype process; they are poor because the sun has not been very strong of late. Comments on this process and wishes JH would make a few experiments with his more perfect apparatus. Inclined to agree with him about the mechanism of the eye.
Sending, care of Dr. Grant, the first part of a series of experiments on the magnetic influence of light, which appeared recently in the Calcutta Journal. Has been unable to obtain a characteristic specimen of Kankar in Bengal. Dr. Hugh Falconer is an expert on the Kankar in Bengal and he will try to obtain information from Falconer.
Will begin building components that JH identified as most immediately needed. Confirm scale of JH's drawings. Will send samples of prism glass for JH to inspect. Cannot yet estimate cost.
Comments on JH's translation of Friedrich Schiller's poem 'The Walk.' Invites the Herschels to Trinity Lodge, then under repair. Mentions James South's odd behavior.
Thanks JH for the poem [JH's translation of Friedrich Schiller's 'The Walk'] he sent. Requests a song sung by 'faery elves' in William Herschel's telescope.
Thanks for his reductions of Schiller's observations. Many people believe the claims made in the 'Moon Hoax'. Is writing a book on the use of the globes.
Thanks for JH's translation of Frederick Schiller's poem. Hopes that they had a pleasant Christmas. Family news.
Thanks JH for JH's translation of Friederich Schiller's poem 'The Walk.'