Thanks for the fragment of poor [Ben?]. Comments on this and the composition of the metal of bells.
Showing 1–10 of 10 items
Thanks for the fragment of poor [Ben?]. Comments on this and the composition of the metal of bells.
Sends set of experimental spectacles for CM to use in testing persons for color-blindness, or 'Dichromic Vision.' Proposes several tests to be conducted with these.
Learned of John Gorrie's mechanical ice-making method. Asks CM to send letter to JH recounting conversation of 11 Feb. 1848 in which JH told CM about JH's theory for making ice by compressing air. JH does not want to interfere with Gorrie's claim, but will submit CM's letter to Athenaeum and put on record, for sake of 'scientific history,' that JH was 'certain' that such a principle would work. Condolences for death of CM's partner.
Has received the glasses from Dr. John Dalton with very minute answers. Dalton gave a paper on this subject in 1794 to the Manchester Society. Will bring them to London tomorrow. Dr. Simms is in a critical condition.
Sends some specimens of aloes and calocynth with some remarks on them. Also sends some sugar made by evaporating the cane juice under diminished pressure. Inquired from J. Lister regarding the elasticity of hardened steel wire.
Hopes this letter will reach him before his departure for the Cape. Wishes someone in the proper climate would make a study of the best kind of Aloe for medicinal purposes. Encloses letter and plates on this subject and would be pleased if JH would show them to Thomas Maclear. Has not been able to obtain any further information from dichromic persons.
Recently came across some instructions JH had drawn up for persons who are color blind. Sends a note explaining the work of William Pole on this same subject. Has left the manufactory at Ipswich.
Sends a small fragment chipped from the second great bell. Comments on the metal of the bell and the causes of the cracks. Unable to attend the R.S.L. dinner tomorrow.
J. J. Lister also made set of experimental glasses similar to JH's [see TxU:H/L-0255]. Lister's experiments on color-blind persons. Will forward Lister's glasses to [John] Dalton. CM plans similar experiments with JH's glasses; will forward results to JH at Cape of Good Hope. Wishes to see JH's grinding and polishing machinery.
Sends note with needed facts [related to JH's early discovery of principle for ice-making machine], plus paragraph that JH may wish to insert [in notice to Athenaeum].