The causes of death in iron and steel workers (non-foundry).

Few studies have been made of the pathology associated with the iron and steel trades other than foundries. We review here the clinical, occupational, and pathological (post-mortem) findings in 10 grinders and 16 other non-foundry workers in iron and steel. Grinding is evidently a less dangerous trade than it was 100 or even 50 years ago, but silicosis and/or mixed dust fibrosis is still found amongst them.

HYDROGEN-ION CONCENTRATION OF THE ALIMENTARY TRACTS OF FOWL, CAT AND RABBIT.

Herein has been presented the results secured in determining the pH of the gastrointestinal tract of the hen, the rabbit and the cat by means of the quinhydrone electrode.

RESPONSES OF SHEEP TO ZYGADENUS GRAMINEUS, "DEATH CAMAS".

An extract of Zygadenus gramineus, "death camas," from which most of the resins had been removed was given intravenously to sheep prepared for recording blood-pressure and respiratory movements. Following the intravenous injection of this extract there occurred a respiratory inhibition which in the case of the injection of larger amounts of the extract was followed by asphyxia-like rises of blood-pressure. The graphic record of this asphyxial condition was practically duplicated by closing the tracheal cannula for a short time following the recovery of the animal from the effects of the plant extract.

A BELT PAPER KYMOGRAPH WITH A THREE SPEED GEAR SHIFT.

1. Herein has been described and illustrated a belt paper kymograph, electrically driven, and provided with a three speed gear shift. 2.

LABORATORY AND TEACHING DEVICES MADE FROM PLASTER OF PARIS.

A method has been described whereby models of septic tanks for teaching public health and oncometers for physiological demonstration and research may be constructed by employing a wire frame and covering it with plaster of Paris These models should prove especially useful to teachers in rural and suburban communities and to extension workers whose task it is to keep a vast number of our population informed as to the best measures of protecting their health These models may be rendered impervious to air and water by means of paraffin, varnish or brushing lacquer.