PART 3.] 
Accessions to Library. 
73 
This result is smaller than the records known up to the present, but these also do not 
rest upon sufficiently decisive observations. Rink, who, during a stay on the islands between 
January and May 1846, never saw the thermometer under 25°C. and never above 33°C. in 
perfect shade, believes 28°C. to be the most probable mean. 
According to Johnston’s Physical Atlas, the line indicating the temperature of the sea 
surface of 30'5C passes just across the group of islands, the annual isothermal being 26'IC., 
with the January isothermal of 25'0C, and the July isothermal of 272C. 
As regards the monthly means, we obtain from the observations of the Danish Corvette 
Galathea every four hours : 
for January 1846 ... ... ... ... ... ... 28'2C. 
„ February „ ... ... ... ... ... ,,, 28'6C. 
According to the hourly observations on board of the Frigate Novara the mean is— 
For the days 23rd,—28th February 1858 ... ... ... 27'2C. 7 „ h 
„ „ „ 1st,-26th March ... .27-5C.j mean 3r25L - 
With this agrees pretty fairly the soil temperature which I measured at a depth of 
one foot. 
On the 26t.h February near Saui ... ... ... 27’7C.') 
„ „ 20th March on Kondul ... ... ... 27'0C. > mean 27'26C. 
„ „ 26th „ on Great Nicobar ... ... ... 27'OC.J 
Finally, with regard to the daily means, they will be found for the time of our stay on 
the Nicobars in the observations recorded on board of the vessel. It occurred to me when 
on Car-Nicobar to see whether the temperature of the water of young coeoanuts, when 
freshly cut down from a tree standing in shadow, would not indicate approximately the mean 
daily temperature. I found on the 26th February, in two nuts, a temperature 27‘2C. and 
27'4C., as a mean 27’3C. The journal kept on board of the Frigate gives for the same 
day, as mean, also 27’3C. 
DONATIONS TO MUSEUM. 
Micraster cor-angumum. —Hertford, England, presented by A. Tween, Esq. 
Belemnites lavis, (2 spec.); B. clavatus, (1 sp.); B. vulgaris, (2 spec.) B. cylindricus, 
(2 spec.) B. sul-aduncatus (2 spec.); B. slriolatus, (1 spec.); B. tubidaris, (2 spec.); 
B. 'penicillatus, (2 spec.) ; B. sulcatvs (1. spec.); Trigonia, Dentalium, Fish teeth (Stones- 
field), &c. presented by Prof. John Phillips, Oxford. 
ACCESSIONS TO LIBRARY. 
From 1st April to 30th June 1869. 
Titles of Boohs. Donors. 
Argyll, Duke of. —Primeval man, 8vo., London, 1869. 
Bourguignat, M. J. R.—Mollusques Nouveaux, Litigieux ou peu connus, 8vo., 1868. 
Beonn, De. H. G.—Klassen und Ordnungen des Thier-reichs. Vol. V, pts. 9, 10, Vol. VI, 
pt. 4, Leipzig, 8vo. 1869. 
Brown, R.—Miscellaneous Botanical Works of—Ray Soc. Vol. Ill, 4to., London, 1868. 
Browne, J. R.—Reports on the Mineral Resources of the United States, Washington, 
8vo,, 1868. The Author. 
Dodd, George. —Dictionary of Manufactures, Mining, Machinery and the Industrial Arts, 
London, 12mo., 1869. 
Dorna, Prof..Alex. —Catalogo delle Leoneidi o stelle meteoriche osservati nel 1867. 
Gebvais, Paul. —Zoologie et Paleontologie generales, Parts 8, 9, Paris, 4to., 1869. 
Gould, A.—Otia Conchologica : Descriptions of Shells and Mollusks, Boston, 8vo., 1862. 
