JUST PUBLISHED, 

 BY THOMAS AND RICHARD WILLATS, 



<> a? & a < 



AND 



instrument 



98, CHEAP SIDE, LONDON \ 

 A THERMOMETRFCAL TABLE, 



ON THE SCALES OF 



FAHRENHEIT, REAUMUR, AND CENTIGRADE. 



Comprising the most remarkable Phenomena connected with Tem- 



perature in relation to Climatology, Physical Geography, 



Chemistry, and Physiology. 



BY ALFRED S. TAYLOR, ESQ., 

 Lecturer on Chemistry, &c. in Gutfs Hospital, 



Price, in Sheet, with Explanatory Pamphlet, Is. 6d. 



Mounted on Canvas, and Folded in Case, 3s.; or, Mounted on 



Rollers, 4s. 6d. 



WILLATS'S SCIENTIFIC MANUALS, No. I. 



Plain Directions for Obtaining Photographic Pictures by the 



Calotype, Energiatype, and other Processes on Paper ; including 



the Chrysotype, Cyanotype, Chromotype, etc., etc., with all the 



latest Improvements. Price Is. 



SCIENTIFIC MANUAL, No. II. 



PRACTICAL HINTS ON THE DAGUERREOTYPE. 



Being simple Directions for obtaining Portraits, Views, Copies of 

 Engravings and Drawings, Sketches of Machinery, <&c. &c. by the 

 Daguerreotype Process ; including the latest Improvements in 

 Fixing, Colouring, and Engraving the Pictures ; with a Description 

 of the various Apparatus. Illustrated by Engravings. Price is. 



