Describes method of varying the size of photographic images. Praises Talbot's light sensitive paper and suggests improvements regarding it. Complains about persons too ready to seek a patent.
Showing 41–60 of 145 items
The Sir John Herschel Collection
The preparation of the print Calendar of the Correspondence of Sir John Herschel (Michael J. Crowe ed., David R. Dyck and James J. Kevin assoc. eds, Cambridge, England: Cambridge Univ. Press, 1998, viii + 828 pp) which was funded by the National Science Foundation, took ten years. It was accomplished by a team of seventeen professors, visiting scholars, graduate students, advanced undergraduates, and staff working at the University of Notre Dame.
The first online version of Calendar was created in 2009 by Dr Marvin Bolt and Steven Lucy, working at the Webster Institute of the Adler Planetarium, and it is that data that has now been reformatted for incorporation into Ɛpsilon.
Further information about Herschel, his correspondence, and the editorial method is available online here: http://historydb.adlerplanetarium.org/herschel/?p=intro
No texts of Herschel’s letters are currently available through Ɛpsilon.
Describes method of varying the size of photographic images. Praises Talbot's light sensitive paper and suggests improvements regarding it. Complains about persons too ready to seek a patent.
Does not have operational telescope. Suggests WS set 1840 as epoch.
Is willing to be a witness to some battery experiments by J. P. Gassiot, but JH is busy, mostly with house hunting, and so may not be available.
Agrees with FB and others about the need for adequately trained men to be sent out to remeasure N. L. Lacaille's arc.
Is sending FA information about magnetic proceedings.
On behalf of the Council of the R.S.L., JH writes to LD to request a camera and a hundred plates of Daguerre's about to be announced process, so that the R. S. L. may equip the James Ross expedition to the Antarctic with the means of making a photographic record of the voyage.
Thanks JE for the account of an experiment performed by JE using an iron ring and a magnet, the results of which JE finds illustrative of the phenomena of Saturn's rings.
Did Académie des Sciences agree to R.S.L. request for magnetic observatory in Algiers? Stresses importance of multinational cooperation. Details of planned global survey of earth's magnetic field. Encloses list of observations needed from Paris.
Describes method of suspending furniture in a ship such that the furniture is less influenced by the ship's motion.
Reticent to accept fellowship of London University if obligations of time and attention are too great. Requests more time to consider responsibilities of the post.
About the question of an astronomer for a vacant position at Kew Observatory.
Discusses Harvard University offer to make magnetic measurements. Requests ES to read Admiralty extracts. Asks questions regarding JH's upcoming review [in Quarterly Review] of several works on terrestrial magnetism.
Expresses great pleasure that the fixed observatories have received official approval and financial support. Approves of ES's cost estimates. Encloses copy of the B.A.A.S. memorial. Agrees to tell Humphrey Lloyd to order instruments as requested by ES.
Regrets deeply the little notice given to the observatories and to Humphrey Lloyd in the R.S.L. President's recent speech. Urges ES to comfort Lloyd. States R.S.L. 'is no longer the sole arena in which a scientific name can be acquired.'
Declines to take steps to call a special committee or council meeting of the R.S.L. regarding foreign communications of the observatories, noting his own wish to stay out of R.S.L. affairs.
JH's brother-in-law John Stewart, who is delivering this letter, seeks admission to a printing establishment. Asks AQ to aid JS. Lists recently received letters. Glad that AQ has [C. F.] Gauss's apparatus. Discusses an experiment in photography.
Mentions visit of 1 Feb. 1839 from W. H. Fox Talbot. Reports that JH has now 'accomp[lishe]d the whole problem [of photography].' Describes JH's recent results.
Because of R.S.L. council meeting on Thursday, suggests Friday meeting with JL and several others.
Thanks WS for offer of professorship of astronomy at Oxford, but declines it, partly because of other pursuits and health reasons, and considers his astronomical career terminated.
Sends plans for and detailed explanation of device to suspend cot or couch in ship so as to 'destroy' ship's motion and alleviate seasickness.