July 12, 1912] 



SCIENCE 



ea 



are on the market. The apparatus here de- 

 scribed may be set up by any plumber at a 

 very small expense — possession of refrigerator 

 and incubator assumed. 



(1) Small tank for constant head, about 1 ft. 

 in each dimension, a, inflow; 6, overflow; c, lead 

 pipe. (2) Refrigerator, a', ice; V, flat coil under 

 ice; c', outflow to incubator. (3) Incubator, a", 

 cold water inflow; 6", overflow; thermometer and 

 burner omitted. 



The diagram explains the construction. 

 The constant-head tank is placed 3-4 feet 

 above the refrigerator. I have used t in. lead 

 pipe vcith twelve turns under the ice (slightly 

 larger would be better). With rather soft 

 artificial ice the water flowing into the incu- 

 bator has a temperature of about 14° C. The 

 incubator temperature desired is, of course, 

 determined by the thermo-regulator. I have 

 been using a small Eeichert regulator and 

 natural gas. Under these rather unfavorable 

 conditions I find a range of about 1° C. around 

 20° C. The results obtained in growing cul- 

 tures have been entirely satisfactory during 

 the past four years. 



Chas. B. Morbey 



Ohio State IjNrvEESiTT 



TEE AMEBICAN ASSOCIATION OF 



MUSEUMS 



The American Association of Museums held its 

 seventh annual meeting in New York City from 

 June 4 to 7. There was a large number of mem- 

 bers in attendance and the convention may be con- 

 sidered in every way a success. Sessions were held 

 at the American Museum of Natural History, the 

 Metropolitan Museum of Art and the Museum of 

 the Brooklyn Institute of Arts and Sciences. 

 Addresses of welcome were made by Dr. Henry 

 Fairfield Osboru, president of the American Mu- 

 seum of Natural History; Mr. Robert W. de Forest, 

 secretary of the Metropolitan Museum of Art, and 

 Mr. Edward L. Morris, acting curator-in-ehief of 

 the Museum of the Brooklyn Institute of Arts 

 and Sciences, and the following papers were read: 



"Notes on Russian Natural History Miiseums,"" 

 by A. R. Crook. 



"An Adaptation of the Goodyear Classification 

 of the Fine Arts to the Dewey System of Number- 

 ing, " by Laura M. Bragg. 



"The Lasting Qualities of a Mounted Mammal 

 Skin," by Robert H. Rockwell. 



' ' The Preparation of Ecological Invertebrate 

 Groups, ' ' by Roy W. Miner. 



"Wild Life of the Far East," illustrated by 

 motion pictures, by Cherry Kearton. 



"The Value of Photographs and Transparencies 

 as Adjuncts to Museum Exhibits," by Caroline L. 

 Ransom. 



"The Care and Classification of Photographs at 

 the Metropolitan Museum of Art," by Ethel Pen- 

 nell. 



' ' The Function of a Museum, ' ' by Paul M. Rea. 



"The Training of Museum Trustees," by 

 Charles Louis Pollard. 



"Boards of Trustees and the Executive Officers 

 of Museums," by Henry L. Ward. 



' ' Why is a Museum, ' ' by Chester L. Boone. 



' ' Laboratory and Museum Shelving, ' ' by Milton 

 J. Greenman. 



"Conveniences in Installation," by C. F. Mills- 



" Glossary of Art Terms," by Henry W. Kent, 



"The Local Flora Problem of a Small Mu- 

 seum, ' ' by Eva W. Magoon. 



' ' The Possibilities of Botanical Exhibits, ' ' by 

 E. L. Morris. 



"The Duty of American Zoologists to Wild 

 Life," by William T. Hornaday. 



"Method of Exhibiting Insect Collections," by 

 Frank C. Baker. 



