CONTENTS. 



SUPPLEMENT TO VOL. XXXL 



Engravings of the following Snbjecfs, 1. Mr. Cook's Apparatus for preparing 

 Gas, Tar, and Tar Spirit, from Pit-coal. 2. iVIr. H. B. Way's Method of 

 extracting Turpentine from British Firs. 3. Dr. Delaroche's Apparatus for 

 exposing Animals to heated Air loaded with aqueous Vapour, 



I. Observations and Experiments on Vision. By William Charles Wells, M. D. 

 F.R.S. - - - - ■- - 321 



II. Method of producing Heat, Light, and various useful Articles, from Pit- 

 Coal, by Mr. B. Cook, of Birmingham - - - 332 



III. Method of procuring Turpentine and other Products from the Scotch Fir, 

 (Pinus Silvestris Linn.) By Mr. H. B. Way, of Bridpoil Harbour '342 



IV. Analysis of Deadly Nightshade, Atropa Belladonna : by Mr. Vauquelin 



350 



V. On the Use of Sulphate of Soda in the Fabrication of Glass : by Mr. Parcel 

 deiserres, Inspector of Arts, Sciences, and Manufactures - 357 



VI. On the Cause of the Refrigeration observed in Animals exposed to a high 

 Degree of Heat: by Francis Delaroche, M. D. - - 361 



VII. A new and expeditious Mode of Budding. By Thomas Andre\w Koight, 

 Esq. F. R. S. - - - - - - 374, 



VIIL Notice respecting Native Concrete Boracic Acid: by Smithson Tennant, 



. Esq. F. R. S. &c. Communicated by L, Horner, Esq. Sec. of the Geological 



Society - - - - - - 37.5 



IX. Notice respecting the Decomposition of Sulphate of Iron by Animal 

 Matter : by W. H. Pepys, Esq. F. R. S. Treasurer of the Geological Society 



, 377 



X. Analyses of Minerals : by Martin Henry Klaproth, Ph. D. &c. 378 

 Scientific News - . _ . . 383 



ERRATA. 



259 Note, for 185, read 134. 

 316 Note, /or 251, read 145. 



A JOURNAL 



