Einstein’s early calculations of gravitational lensing, contained in a scratch notebook and dated to the spring of 1912, are reexamined. A hitherto unknown letter by Einstein suggests that he entertained the idea of explaining the phenomenon of new stars by gravitational lensing in the fall of 1915 much more seriously than was previously assumed. A reexamination of the relevant calculations by ...

The species of the halictid bee genus Caenohalictus Cameron occurring in Argentinean Patagonia are revised. Eight species are recognized, one of them here described as new: Caenohalictus flammeus n. sp. The female of C. turquesa Rojas & Toro 2000 is described for the first time. Pseudagapostemon babuarus Jörgensen 1912, based on the male holotype, is synonymized under Augochlora (Pseudaugochlor...

a General Duty and Regimental Medical Officer, but in Belgium collected an MC (for 'liberating a case of champagne for the Officers' Mess') and also married the sculptress Jacqueline Heyse. On demobilisation he grasped his chance, and for the next ten years worked successively as Registrar and Surgical Tutor in Professorial Units in Bristol, Edinburgh, Baltimore USA, Oxford and Leeds; so by 195...

Idem., St. Bart's Hosp. med. Rep., 1912, 43, 73. Idem., Brit. med. J., 1912, ii, 1367. Idem., Brit. J. Surg., 1914, 2, 17. Idem., The Robert Jones Birthday Volume, Oxford University Press, 1928, p. 127. Idem., J. Bone Jt Surg., 1931, 13, 423. ELMSLE, R. C., FRASER, F. R., DUNHLL, T. P., VICK, R. M., HARRIS, C. F., and DAUPHINEE, J. A., Brit. J. Surg., 1933, 20, 479. ELMsLE, R. C., Lpool med.-ch...

subject within the available space. The first two hundred odd pages contain many and varied papers on subjects connected with The Alimentary Canal. In making mention of two only, namely, one on " The Diagnostic Worth of the Glycyltryptopban and Tryptophan Tests in Diseases of the Stomach," and the other on "Intestinal Diverticula," it is evident that, in the variety offered for perusal in this ...

Nettie M. Stevens is one of the first women who contributed to genetic research. She discovered the role of sex chromosomes in sex determination during the first decade of the twentieth century. However, her discovery has rarely been recognized, and her scientific reputation was eclipsed by that of T.H. Morgan, who was credited for the establishment of modern genetics. Her name is absent from m...

Recently we celebrated the 100th anniversary of the birth of Academician Victor Preda. On this occasion, the Department of Molecular Sciences, supported by the local branch of the Romanian Academy and Institute of Biological Research Cluj-Napoca, organized a commemorative scientific session “Academician Victor Preda centenary” which was attended by leading figures of the Iuliu Hațieganu Univers...

Psectrosciara floridensis sp. nov. belonging to the scatopsiformis group is described and illustrated. This species is closely related to Psectrosciara scatopsiformis Enderlein, 1912, Psectrosciara californica (Cole, 1912), Psectrosciara brevipennis Cook, 1958, and Psectrosciara serrata Cook, 1958. A new record of Parascatopse sonorensis Cook is reported from the state of Florida.

Deuteragenia leleji sp. nov . is described and illustrated, based on a female from Sumatra, Indonesia. This extraordinary species possesses peculiar character, cleft tarsal claws, recorded for the first time in genus Šustera, 1912 tribe Deuterageniini 1912. The newly reported island of Sumatra.