Further on the electrochemical decomposition of metallic salts [see AS's 1843-2-28], and its relationship to photography.
Showing 21–40 of 49 items
Further on the electrochemical decomposition of metallic salts [see AS's 1843-2-28], and its relationship to photography.
A new committee on standards is to be created to oversee the preparation and measuring of appropriate standard measures; seeks JH's opinion about asking Francis Baily and W. H. Miller to do the accurate weighing and measuring.
Requests on behalf of Richard Taylor, editor of Philosophical Magazine, use of plate from R.S.P.T.
Some comments about photographic processes and about RH's observations of the heavens [see RH's 1843-3-24].
Wishes CH a happy 93rd birthday. Occupied with remodelling the Southern Constellations, which 'are all in confusion;' admits that not everyone will be satisfied with his constellation reforms.
Sends JH observations of Comet of 1843; disappointed with Cape Observatory's records of the comet. Oversees Observatory in absence of Thomas Maclear, who is at Zwartland for meridian survey. Lists and describes instruments in use at Cape Observatory. Discusses sources of error.
Covering letter to one by Edward Cooper regarding appearance and observations on new comet.
Official acknowlegement of JH's work on photographic reproduction.
Would be pleased if Francis Baily and W. H. Miller would agree to serve [see GA's 1843-3-9]; believes sufficient remuneration should be provided for these responsibilities, and comments on the desirability of a continuing standards committee.
Has forwarded a parcel to JH, but wonders if he has received it as he has had no reply.
Further regarding the method to be adopted for the printing of the star catalogue.
Further regarding the constellations.
Further regarding the method to be adopted for the printing of the star catalogue.
Further regarding the constellations.
Encloses a draft of a letter that it is proposed should be sent to Sir Robert Peel.
Accepts his invitation to visit him in order to discuss various matters.
Invitation to come to Collingwood to discuss star arrangements.
Has sent note to the Times about the comet.
Newspaper noted Caroline Herschel's 93rd birthday. Requests copy of William Herschel's portrait. Gives address of London relative, Charles Stonhouse, who can copy it. Would JH sit for portrait there also? What did JH decide about 'our comet'?
Comments on confusion between observing comet and zodiacal light. Extensive comments on various materials used in a photographic process where negatives change to positives over long time.