April, '09] JOURNAL OF ECONOMIC ENTOMOLOGY 195 



ered necessary to maintain this scrupulous degree of accuracy. Fur- 

 thermore, the general recommendation of most entomologists of 1 

 oz. to 100 cubic feet of space, a proportion abundantly justified by 

 experience and one appealing strongly to the practical nurseryman 

 and farmer, appears to have been entirely overlooked. Exactitude 

 is commendable, scientific accuracy is desirable, but neither are ad- 

 vanced by the use of large decimal figures, unless unavoidable, in 

 popular bulletins. We should never forget that the general adop- 

 tion of recommendations by the entomologist depends in large measure 

 upon their appealing to the practical sense of the parties charged 

 with their execution. 



Obituary 



MARK VERNON SLINGERLAND 



Mark Vernon Slingerland, Assistant Professor of Economic Ento- 

 mology in Cornell University, died of Bright 's disease at his home in 

 Ithaca, March 10. His health had been failing for some time, but to 

 most of his friends his death was unexpected. 



Professor Slingerland was born in Otto, Cattaraugus County, N. Y., 

 on October 3, 1864. He was a son of Jacob A. and Mary (Ballard) 

 Slingerland. He was educated in the Otto village school and in the 

 Chamberlain Institute at Randolph, N. Y. In 1887 he entered Cor- 

 nell and in 1892 he was graduated with the degree of Bachelor of 

 Science in Agriculture. He obtained special mention for special 

 study with marked proficiency in entomology during the last two 

 years of his course. From 1890 till 1904 he was assistant entomologist 

 in the Agricultural Experiment Station, and in 1899 he was appointed 

 assistant professor of economic entomology. 



Professor Slingerland was a member of the Holland Society of New 

 York, the American Association of Economic Entomologists (of which 

 he was president in 1903), the Entomological Association of Wash- 

 ington, the National Mosquito Extermination Society and the Society 

 of Sigma Xi (vice-president of the Cornell chapter in 1903 and 1904), 

 and a fellow of the American Association for the Advancement of 

 Science. 



Professor Slingerland married, in 1891, ]\Iiss Effie B. Earll, who was 

 a special student in the university in 1889-91. She survives him, with 

 one daughter. 



Although Professor Slingerland had barely reached middle life, 



