566 General Notes. 
the paraffin method. 
As celloidin, like paraffin, does not readily penetrate chitinous 
envelopes, cuticula and cocoons, care should be taken :— 
To use at first very thin solutions, which should be gradually 
brought to the concentration which the imbedding mass is to have 
2. To i twice, the first time merely to cut the object in 
pieces, or open a cocoon, or cut etc., with the microtome. 
SCIENTIFIC NEWS. 
—The American Association for the Advancement of Science 
will hold its thirty-seventh meeting at Cleveland, commencing 
August 21st, under the Presidency of the Hon. J. W. Powell, of 
Washington, D. C. 
—The International Geological Congress will hold its fourth 
meeting in London, commencing September 14th. The honorary 
president is Professor T. H. Huxley, who is also president of the 
a aa committee. The Acting president is Professor J. Prest- 
witch. 
—The British Association for the Advancement of Science ho 
its annual meeting at Bath this year, commencing September 
The President is Sir Frederick J. Bramwell. 
—The Annual Excursion of the Geological Society of France 
will be this year in the neighborhoods of Commentry, Chaba 
St. Germain des Fossés, Moulin and St. Armand. A grea 
of geological formations will be visited. 
— Professor Charles Linden, of the Buffalo High School, died ® 
Buffalo, N. Y., February 3d, 1888, aged fifty-six years. a 
born in Breslau, Germany, and came to this country at an a 
His studies were in the line of ornithology, and he eer 
expeditions to Florida, Brazil, the West Indies, and La : 
