Herbert Leader Hawkins, 1887-1968

Sleeter Bull, 1887-1968: a brief biography.

Herbert Thoms

The eventful chapters of contemporaneous medical history in Connecticut have not yet received the historian's scrutiny and are still only records scattered here and there in organization archives and miscellaneous correspondence. Many of us have been a part of these events and as participants are poorly qualified to place values on them. As in all history, one must await the developing vista of...

The weak Hawkins-Simon Condition

A real square matrix satisfies the weak Hawkins-Simon condition if its leading principal minors are positive (the condition was first studied by the French mathematician Maurice Potron). Three characterizations are given. Simple sufficient conditions ensure that the condition holds after a suitable reordering of columns. A full characterization of this set of matrices should take into account t...

Herbert Herbert: his corneal pits and scleral slits.

PURPOSE To evaluate the life and professional work of the English ophthalmologist Herbert Herbert (1865-1942). DESIGN Historical study. METHODS The main sources for this investigation are Herbert's approximately 65 published papers and 3 monographs. Other sources are contemporary publications by other ophthalmologists and secondary historical reviews of this period. Written communications w...

Victor Jollos ( 1887 - 1941 )

Victor Jollos studied fruit flies and microorganisms in Europe and the US, and he introduced the concept of Dauermodifikationen in the early 1900s. The concept of Dauermodifikationen refers to environmentally-induced traits that are heritable for only a limited number of generations. Some scientists interpreted the results of Jollos's work on Paramecium [4] and Drosophila [5] as evidence for cy...