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1885. ] Scientific News. 431 
out and will be sent to an antiquarian for identification. The cave 
is almost on the line of the new West Virginia Central Railroad. 
—The Amsterdam Allgemein Handelsblad, publishes a commu- 
nication from Professor Cohn, recapitulating the substance of the 
correspondence between Leeuwenhoek and Francis Aston, F.R.S: 
The celebrated naturalist, writing from Delft in 1683, tells Aston 
how, with the aid of the microscope, he had discovered and dis- 
tinguished minute organisms amongst the particles of food re- 
moved from between his tecth. In 1692 Leeuwenhoek sent 
sketches of these organisms to the Royal Society; but he expe- 
rienced a period when he could not discover any traces of them, 
and attributed their disappearance to the use of hot coffee.—Eng- 
lish Mechanic. 
—The works of Darwin are not allowed to be issued from the 
circulating libraries of Russia, and a recent imperial decree puts 
those of Agassiz, Huxley, Lubbock, Adam Smith, Lewes, and 
Spencer on the same list. The new list is not confined to Eng- 
lish and American authors, for Moleschott, Biichner, Vogt, Re- 
clus, and others are considered unsuitable for Russian readers. 
—The death is announced of Mr. John Gwyn Jeffreys, LL.D., 
F.R.S., the distinguished conchologist and naturalist. Mr. Jef- 
freys was born at Swansea, in 1809, and was called to the bar; 
but about twenty years ago he retired from practice, and devoted 
himself entirely to his favorite branch of science. In his early life 
he was an enthusiastic dredger, and as soon as he was able pur- 
chased a yacht in order the better to prosecute his work. When 
the Porcupine was fitted out in 1869, in company with Dr. Car- 
penter and the late Sir Wyville Thompson, Mr. Jeffreys conducted 
the exploring voyages, and subsequently superintended the scien- 
tific work of the Valorous, when that frigate accompanied our 
latest Arctic expedition as far as Davis straits. His first paper 
was contributed to the transactions of the Linnean Society at the 
early age of nineteen, and since then his contributions to the 
transactions of the Royal and other societies, have been both 
numerous and valuable. 
—Professor Lauritz Esmark, director of the zoological museum 
of the University of Christiania, Norway, died in December last. 
He once spent nearly two years in this country, traveling exten- 
sively, and was hospitable to American naturalists visiting in 
Norway. 
` —Vice-Admiral H. W. Bayfield died at Charlottetown, N. S., 
February 12, aged go years. He will be remembered for his sur- 
veys of the St. Lawrence gulf and the coast of Labrador. 
—The death is also announced of Dr. Friedrich von Stein, 
professor of zodlogy and zoétomy in the University of Prague for 
irty years. Professor Stein was sixty-seven. 
