ON THE ABSORPTION SPECTRA OF PURE COMPOUNDS. 339 
Report of the. Committee, consisting of General FEsTING (Chair- 
man), Dr. H. E. Armstrone (Secretary), Captain ABNEY, and 
Professor W. N. Hart.ey, on the Absorption Spectra of Pure 
Compounds. 
Tue spectra of a number of substances have been determined during 
the year, but as the object of the Committee is to draw definite con- 
clusions as to the relation between structure and properties throughout 
series of related compounds, and the material at disposal is not yet 
sufficient for this purpose, they desire that they may be reappointed in 
order that the investigation may be continued. 
Report of the Committee, consisting of Dr..H. Woopwarp, Mr. R. 
ETHERIDGE, Mr. R. Kipston, the Rev. G. F. WHIpporNeE, and 
Mr. J. E. Marr (Secretary), appointed for considering the best 
methods for the’ Registration of all Type Specimens of Fossils 
im the British Isles, and reporting on the same. 
Tue Committee have considered the best methods of obtaining records of 
the type specimens of British Fossils, and they would recommend that a 
circular letter and record-sheet similar to the annexed forms be sent to 
curators of museums and owners of private collections :— 
Sir,—A Committee having been appointed by the General Committee 
of the Association for ‘considering the best methods for the registration 
of all type specimens of fossils in the British Isles,’ the Secretary of the 
Committee would be greatly obliged if you would kindly fill in the ac- 
companying form with particulars concerning any type specimens of 
British Fossils which are preserved in the collection under your charge.! 
The forms should be returned as soon as possible to , who will 
be glad to give further information, if required. 
(Form of Record Sheet.) 
Name under| Where origin-| Name under Exact strati-| In what | Nature (whether 
* . hich now | Locality or 7 - entire, or if not, 
which first | ally describea| rc graphical | collection date ¢ 
. generally localities Ee A what portion pre- 
deseribed | and figured mecnd ad horizon deposited served, &c.) 
The Committee would suggest that they be reappointed. 
_) Should these returns be printed by the British Association, you would be sup- 
plied with copies for the use of your museum. 
Z2 
