1930 Washington Fern Notes

Notes on Barnsley Fern

An affine transformation on the plane is a mapping T that preserves collinearity and ratios of distances: given two points A and B, if C is the middle of the segment [A,B] then T (C) is the middle of the segment [T (A), T (B)]. Translations, contractions, expansions, reflections, rotations, are all particular cases of affine transformations. In general, an affine transformation T maps a point (...

Harvey Washington Wiley (1844-1930): champion of the Pure Food and Drugs Act.

Notes on Three Cases of Interstitial Tubal Pregnancy *Held as read 12th February 1930.

was aroused by the occurrence in our hospital work of two cases. These two cases we wish to report to you, and with them also we would include a further example (the most arresting of the three) which came under the care of Professor Johnstone, and in which case one of us (E. C. F.) had also been directly interested. Instances of interstitial pregnancy are admittedly of rare occurrence, and in ...

The Medical Annual, 1930

plus 167. Profusely illustrated, ana witn ri Plates, plain and coloured. Bristol: John Wriaht & Sons, Ltd. Price, 20s. plus postage. If the medical man?whether general practitioner consultant, or specialist?were limited to the purchase ol only one book annually, we feel certain that his choice would be the Medical Annual. Every year this notable and important work grows in interest and authorit...

Op-brhe130245 1929..1930

The musculoskeletal community has struggled to secure from health policymakers and providers the level of engagement the disease burden demands. Considerable effort has been expended to define boundaries of conditions within which there is a spectrum of severity but between which there is substantial overlap. Acknowledging this, rheumatologists have long debated the value of lumping vs splittin...