Preliminary Note on some Witches' Brooms

Rust fungi causing galls, witches' brooms, and other abnormal plant growths in northwestern Argentina.

Conspicuous galls and witches' brooms frequently are symptoms of rust infections on plant hosts in the ecologically diverse northwestern region of Argentina. These symptoms are caused by systemic or locally systemic spermogonial-aecial infections, although uredinial and telial infections also might be involved. Sixteen species of rust fungi are treated in this paper, most of which cause a plant...

A Preliminary Note on Spirochætosis

|/ (1). Introduction. "The Arab Caravan brings bugs." A fact crudely recognised by the inhabitants of the many countries through which Arab traders travel, would lead one to expect that their mother country should prove no exception to the rule. Arabia, however, is a land where ticks swarm alone along its low lying fringe. In the high lands these acarids abound only along the big caravan routes...

Note on Some Oscillation Criteria1

then (1) must be oscillatory. Various refinements as well as variations of the criterion (3) were obtained by Hartman in [l]. The present note will be devoted to the derivation of two further criteria, given in (*) and (**) below, involving the function G(t) of (3). Let E(M, T) denote the set of points t of the half-line T^t < oo for which the function G(t) of (3) satisfies the inequality G(t) ...

Note on Some Gap Theorems

A Preliminary Note on the Pharmacological Action of Some Organic Antimony Derivatives

to the preparation of triaryl-stibiues. Later, Grignard's reaction gave rise to the preparation of triphenvl-stibamines. Most of the present development of the organic-antimony derivatives, however, is due to the work done by Chemische, Fabrik Von Heyden who discovered the process of introducing into the aromatic nucleus the antimonial group through the agency of the diazoreaction. Great impetu...