Professor How on Natro-boro-calcite, &c. 118 
(Hayesine, Dana) constituting a distinct species from Natro-boro- 
calcite, whose existence seems to be sufficiently established by the 
repeated finding of not very dissimilar quantities of soda in analyses 
of specimens from two of its three localities, as seen in the following 
list, which contains all the analyses I have been able to find :— 
BOs. CaO. HO. NaO. KO. SOs. NaCl. Sand. 
Peru, . 4611 18:89 35-00 Havent 
Tuscany, . 51:135 20°85 26°25 Bechi* 
Peru, - 49°50 15°90 25:80 8: Ulext 
8:8 
n . 49°50 17-70 26:00 88 rote 
:, . 4546 14:32 8-22 0-51 110 265 9:32 Dick* 
y . 43:70 1311 35°67 667 0-83 Ramm.t 
47-25 15°98 25:46 9-88 0:45 0:98 Anderson§ 
Nova Scotia, 41°97 13:95 34:39 8-36 1:29 MgO 0:04 H. How* 
iy 4410 14:20 34:49 7-21 zi 
In the account of the analysis by Anderson, the quantities of soda 
and sulphuric acid, as given above, are reversed ; from the conclu- 
sion drawn by the author, this is evidently a typographical error. 
As regards the amount of water present, no mention is made, in 
any case but my own, as to the temperature at which the substance 
was dried; in my analysis the mineral was air-dried, The soda, it 
will be observed, is a constant ingredient, in pretty uniform amount, 
in all but the first two analyses ; and in my, examination as stated 
at the time, the mineral was washed, for the second analysis, with 
cold water till all sulphuric acid was removed. 
From the preceding data the following formule have been de- 
duced :— 
CaO 2 BO,+6HO . Hayes ; 
NaO 2 BO, +2 CaO, 3 BO, +10 HO. Ulex ; 
NaO 2 BO, +2 CaO, 3 BO, “415 HO. H. How ; 
NaO 2 BO, +2 (CaO 2 BO,) +18 HO. Rammelsberg ; 
all referring to a mineral found in rounded masses, consisting of 
interwoven fibres, opaque, snow-white, and of a silky lustre. 
The mineral to which I would now draw attention was found in 
the same quarry as the preceding, at a distance of about 100 yards, 
and at about 20 feet lower level, and also associated with glauber- 
salt, which, it is worthy of notice, is generally met with here, accord- 
ing to the quarrymen, in narrow seams at the line of junction of the 
* Dana’s Min., 4th ed., p. 394. 
+ Liebig und Kopp’s Jahrb. 1849, p. 780. 
{ Silliman, Sept. 1856, 3d Supt. to Dana’s Min., p. 6. 
§ Proc. Phil. Soc. Glasgow, Feb. 1853. 
NEW SERIES.—VOL. XIV. NO. I.—JuULY 1861. P 
