H. How on Natro-boro-calcite, &c. 9 
New Haven, May 1, 1861. 
Arr. II.—Natro-boro-calcite and another Borate occurring in the 
Gypsum of Nova Scotia; by Henry How, Professor of Chem- 
istry and Nat. Hist., King’s College, Windsor, Nova Scotia. 
Axour three years and a half ago I showed the existence of 
Natro-boro-calcite in the G psum of Windsor N.S.* I was not 
aware at that time that Dr had an- 
* Edin. N. P. Journal, July, 1857, This Journal, Sept. 1857. 
+ This Journal, Nov. 18 , p. 95. 
Au. Jour. So1—Srconp Serres, Vo. XXXII, No. 94.—Jutr, 1861. 
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