London: The Royal Society, 1840. 1st Edition. BOUND 1st EDITION, PARTS I & II TOGETHER HOUSING FIRST EDITIONS OF MANY IMPORTANT PAPERS IN A WIDE VARIETY OF FIELDS: THE SCIENCE OF PHOTOGRAPHY, ELECTRICITY, PHYSIOLOGY, & ASTRONOMY. Fine condition; 30 plates.
HERSCHEL'S: Herschel’s seminal paper is by far his most elaborate on the subject, introducing “the photographical concepts 'positive' and 'negative' to express… pictures in which the lights and shades are the same as in nature, or as in the original model, in which they are opposite. Also included is a densely packed detailed account of the use of hyposulfite of soda as a fixative, his observation of the superior light-sensitivity of bromide of silver, a description of his 1st experiments with photography in solar spectroscopy, and his process… for obtaining direct positive proofs on paper, the necessity of using achromatic lenses for correct delineation, etc.” (ibid; Schaaf, Out of the Shadows, 94).
Herschel’s discussion of “the dynamical interplay between photochemistry and photography is of the greatest importance in applied photography. The later sections of the paper deal with the spectrum of the sun, [his] so-called thermographical representation of the spectrum of the sun (with description of the Actinograph, invented by him), rendering the heat radiation visible in the spectrum… reproduced here on one of the plates” (ibid).
Herschel wrote: "The object which the author has in view in this memoir is to place on record a number of insulated facts and observations respecting the relations both of white light and of the differently refrangible rays to various chemical agents which have offered themselves to his notice in the course of his photographical experiments, suggested by the announcement of M. Daguerre's discovery.....The terms "direct" and "reverse" are also used to express pictures in which objects appear, as regards right and left, the same as in the original, and the contrary....The principal objects of inquiry in the present paper...are the following… The means of fixing photographs, the comparative merits of different chemical agents...The means of taking photographic copies and transfers.....The preparation of photographic paper....The chemical analysis of the solar spectrum forms the subjects of the next section in the paper..."(Herschel 1840).
FARADAY'S: “In 1931 in a series of never-to-be-forgotten experiments, Faraday in quick succession discovered the laws of induced currents, and in so doing laid that foundations for the unparalleled triumphs of modern electricity. He made the fundamental discovery that whenever lines of magnetic force are made to cut across a conductor… or a conductor is made to cut across lines of force, a current is induced in the conductor. In this basic principle lay the invention of the dynamo, the electric motor, the induction coil and transformer, the x-ray, and a host of revolutionizing application of this mysterious form of energy. Without this discovery, electricity would still be the plaything of science. Immediately following this, Faraday in a series of researches worked out the laws of electrochemical action and invented the first accurate electric measuring instrument” (Darrow, Masters of Science, pp. 76-77).
BOWMAN’S: One of Bowman’s two “classical descriptions[s] of the striated muscle,” this being the 1st (G & M 542); we offer the 1841 2nd paper separately.
PARSON’S: The Earl of Rosse gives a detailed account of the experiments which step by step led to his construction a reflecting telescope with a mirror 72 inches in diameter, then and for the next 70 years, the largest in the world. Parson’s designed and made everything himself, even setting up a foundry to cast the mirror and inventing a huge machine to polish it. Item #1258
CONDITION: Complete. 30 plates. Faded stamp & blind stamp on title page; no other markings. Handsomely rebound in calf. 5 raised bands at the spine. Red & black gilt-lettered spine labels. Original wide margins. Bright & clean. Fine.