A SIMPLE MANOMETER FOR MEASURING LOW PRESSURES

A Combination Simple Manometer and Constant Volume Differential Manometer for Studies in Metabolism

The purpose of this article is to describe a manometer which we have developed during the past year for studies in metabolism and which appears to include a number of features of wide-spread use and interest. It is a combination manometer, offering in a single apparatus the possibilities of either direct or differential manometric measurements. For direct measurements it is the equivalent of tw...

A Celluloid Capsule for Measuring Venous Pressures.

The methods of determining human venous pressure directly by venous puncture and indirectly in various ways have been reviewed by Eyster, 1926, 1929. Among the indirect methods that of applying a capsule to a superficial vein has been most used. The air within the capsule is raised to a pressure sufficient to collapse the vein, a pressure therefore estimated approximately equal to the blood pre...

A New Instrument for Measuring Pressures in a Gun.

Lewis has already pointed out that a theory of the kind outlined in this paper explains satisfactorily the facts which have led many chemists to assume polar valence. For example, the chlorine atom in chlor-acetic acid, because of the relatively large charge on its kernel, as compared for example with a carbon atom, tends to displace towards itself the electrons holding it to the carbon atom. T...

A simple manometer for the continuous measurement of intra-ocular pressure.

THE adequate measurement of the intra-ocular pressure, both clinically and experimentally, has remained a baffling problem. The tonometer has obvious disadvantages whiclh have been summarized by Duke-Elder (1932). Chief amongst these, in the opinion of the present authors, is the possibility of self-deception, since the variations in the results of repeated determinations are often quite large ...

Integrated Digital Manometer for Lumbar Puncture