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THE AQUARIUM BULLETIN 



iBruoklyu Aquarium ^xiriely, 3lnr. 



Franklin Avenue at Hancock Street 

 (Brooklyn Public Library) 



Meetings Every Month 



(except July and August) 



Second Tuesday, Business, etc. 



Fourth Tuesday, Exhibitions of Fish, 



Lectures, etc. 



OFFICERS 



JOSEPH FROEHLICH President 



GEO. W. POST Vice-President 



FRANCIS G. DANIELL....Recording Sec. 



A. E. SCHIERBAUM Cor. Sec. 



CARLTON H. CHAPIN Treasurer 



FRANK B. JOHONNOT Librarian 



THE AQUARIUM BULLETIN 



Elbert Wilcox Editor 



252 East 25th St., Brooklyn, N. Y. 



Carlton H. Chapin Business Manager 



479a Quincy Street, Brooklyn, N. Y. 



Advertising Rates Upon Application. Annual 

 Subscription 50c. Single copies 5 cents. 



Vol. 4 November 1917 No. 3 



In tlie October number of The 

 Aquarium Bulletin there appeared an 

 article on the thermometer in which, 

 we regret to say, a typographical 

 error passed unnoticed. 



In Formula No. 1, ])age 34, and 

 again in the example illustrating 

 Formula No. 1, the factor (33-1. (Sn) 

 shf)uld have read (32xL<Sn). The 

 answer to the example, however, was 

 correct. 



I"or the benefit of our readers who 

 may have occasion to convert tem- 

 peratures from the Cent, scale to the 

 Fahr. scale or vice versa, we repeat 

 the formula below in a little different 

 manner that we think will make their 

 use more clearly understood. 



Given a temperature of N degrees 

 C, to find the equivalent temperature 

 in degrees F, use Formula No. 1 : 



N degrees C-(32xl.8n) degrees F. 



Example — 10 degrees C-(33xl.Sx 



10 )-.')() degrees F. Given a tem- 

 perature of N degrees F, to find the 

 equivalent temperature in degrees C, 

 use Formula No. 2 : 



N degrees F-5(n-32) degrees C. 



Example — (iS degrees F-9 .5(()(S-33) 

 -"30 degrees C. 



The December number will otTer 

 some unusually interesting articles. 

 Among others is the explanation of 

 Dr. F. A. Lucas, Director of the 

 American Museum of Natural His- 

 tory, New York, of the changing of 

 colors in Shubunkins and other fish, 

 both domesticated and wild. 



Dr. R. W.Shufeldt of Washington, 

 whose works are well known to TAB 

 readers, will present a finely illustra- 

 ted article on The Difl^erent Fishes of' 

 Bermuda. 



Miss Ruth of the Children's Mus- 

 eum, Brooklyn, will write an intensely 

 interesting story. 



Something never before attempted 

 will be the article by Mr. Josei:»h 

 Froehlich "How to Distinguish the 

 Sex of Our Aquarium Fishes." A 

 study of this series will enable the 

 aquarist to instantly determine the 

 sex of the various aquarium fish. 



Mr. Richard Deckert of the N. Y. 

 Zoological Society will write on 

 Frogs. 



Other good things too numerous to 

 mention will be presented. 



At the November 13th, meeting of 

 the .Society three members of the 

 Nominating Committee will l)e 

 elected. 



The December 11th meeting will 

 be the only one for the month. It will 

 be a .Social evening, refreshments and 

 music being prominent on the 

 programme. 



