Letters from Silas Burroughs to his junior partner Henry Wellcome and other business associates have recently come to light Written during his travels (1880-1882) soon after the establishment of their pharmaceutical company, the letters show how this energetic, resourceful and imaginative salesman developed and expanded the business overseas and tackled the problems of preservation, packaging a...

In 1880 at the age of 82 Fortuné Landry factored the 20 digit number F6 = 264 + 1 . How did he do it? Landry himself never described how he factored F6 ; however, he did leave enough clues in his work and letters to provide some indication of the ideas with which he was working. In this paper we present a likely reconstruction of Landry's technique.

J. Clin. Biochem. Nutr. | September 2011 | vol. 49 | no. 2 | 69 doi: 10.3164/jcbn.10 138SRInt ©2011 JCBN JCBN ournal of Clinical Biochemistry and Nutrition 0912-0009 1880 5 86 the Society for Free Radical Rese rch Japan Kyot , Japan jcbn1 -138SRInt 0.3 64/jcb .10-138SRInt Introduction Physiological Relevance of Antioxid/Redox Genes; Learning from Genetically Modified Animals Guest Editor: Junic...

Three new species of Epicephala Meyrick, 1880 are described based on specimens reared from fruits of Phyllanthusmicrocarpus (Benth.): Epicephalamicrocarpa sp. n. and Epicephalalaeviclada sp. n. from Guangxi and Hainan, and Epicephalatertiaria sp. n. from Guangdong and Guangxi. Photographs of adults and illustrations of genital structures are provided.

Tinagma armeniacum Gaedike, sp. n. is described from Armenia. New country records are presented for anchusellum griseellum Budashkin, 2003, columbella (Staudinger, 1880) and ocnerostomella (Stainton, 1850). Nine species now known the Caucasus region.

The genus Susuacanga Martins, 1997 is redescribed. A new combination, S. blancaneaui (Bates, 1880) comb. nov. and a new synonymy, Eburia unicolor Bates, 1870 = S. octoguttata (Germar, 1821) are proposed. The genus is now composed of 12 species. The geographical distribution of S. opaca is expanded to include Belize. Photographs of Susuacanga species are included and a key to differentiate them ...

The classical Center-Focus problem posed by H. Poincaré in 1880’s asks about the characterization of planar polynomial vector fields such that all their integral trajectories are closed curves whose interiors contain a fixed point (which is called a center). In this paper we describe a new general approach to the Center Problem.

Thomas A. Edison: Sketch of Activities, 1874-1881: Norman R. Speiden ...................................... 137 Thomas A. Edison and the Founding of Science: 1880 ............ 142 Thomas A. Edison and the Naval Research Laboratory: A. Hoyt Taylor ......................................... 148 The Nature and Development of Operations Research: Charles Kittel. 150 Patent Policies in Educational In...

The US fertility transition in the nineteenth century is unusual. Not only did it start from a very high level and early nation’s development, but also took place long before mortality transition, industrialization, urbanization. This paper assembles new county-level, household-level, individual-level data, including complete-count IPUMS microdata databases of 1830–1880 censuses, to evaluate di...