22 THE AMERICAN MUSEUM JOURNAL 
including the American Museum. From the point of view of the 
specialist, the exhibition was most interesting, but it required too much 
explanation for the average visitor to spend the time over it that it 
deserved. 
The department of Botany contained many features of general 
interest, among which may be mentioned the natural Spineless Cactus 
from the Island of Culebra, Porto Rico; a set of more than 100 dairy 
fungi and bacteria, including those that give the flavor to Camembert 
cheese, produce the sweet and sour curdling of milk and turn milk 
different colors; and a series of remarkable photomicrographs of thin- 
sections of American woods. 
The Chemistry exhibit was large. Its most popular features, per- 
haps, were those pertaining to radium and the effects of its use in surgery. 
‘The department of Electricity was much in evidence at the exhibition, 
on account, particularly, of the Telharmonium and the “ Helion Fila- 
ment” incandescent lamps. ‘lhe former is a newly devised musical in- 
strument, while the latter is a new lamp that bids fair to introduce a 
revolution in methods of illumination. ‘The production of the helion 
lamp follows closely upon the successful manufacture of the tantalum 
and the tungsten lamps and marks the third wonderful discovery in 
incandescent lighting within two years. ‘The new filament consists of 
silicon deposited upon carbon, and, although it costs more than the 
ordinary carbon filament, it lasts much longer and gives more than 
three times as much light for the same consumption of power. 
In the department of Ethnology and Archeology local interest 
centered around a large earthenware jar of Iroquoian Indian manufac- 
ture which was exhumed recently at 214th Street and 10th Avenue, 
Manhattan Island. The specimen is not unique, but it is the most 
perfect that has been found in this vicinity. An exhibit having impor- 
tant bearing on the antiquity of man in America was that of some worked 
bone objects from caves in California. ‘The objects are apparently 
of Glacial or interglacial age. 
The department of Experimental Evolution attracted the attention 
of the public through the crowing of some live roosters introduced for 
the purpose of showing the effects of breeding along certain lines. Other 
interesting exhibits were specimens and diagrams showing the mani- 
festations of the Mendelian law of inherited characteristics under cross- 
breeding. In the department of Experimental Psychology mention 
