A Simple Apparatus for Shaking Bacterial Cultures

Apparatus for Maintaining Bacterial Cultures in the Steady State

When cultures of bacteria are transferred in the usual way, both the character of the cells, and the composition of the medium are constantly changing. If the cell concentration is held constant, on the other hand, the composition of the medium (including enzymes and viruses) in which the growth occurs, must also be constant and any change in the concentration of any substance indicates a chang...

A Simple Anæsthetic Apparatus

In the apparatus about to be described I make no claim to originality in design. It has been my endeavour to find the simplest form of anaesthetic apparatus which could, with slight adaptation, be used with reliability for intra-tracheal, intra-pharyngeal, or intra-nasal induction using ether with air or oxygen. This apparatus has been in constant use for the past 33r years in certain Indian mi...

A Simple Apparatus for Intratracheal Anæsthesia

Surgeon to the Bristol General Hospital.

A Simple Apparatus for Distilling Water

A simple anaesthetic apparatus for small animals.

This apparatus was developed for the anaesthesia of small animals, including infant and adult mice, rats, guinea-pigs, rabbits, and rhesus monkeys. The general layout of the apparatus is shown in the diagram. The apparatus consists of an electric pump which drives air through a two-way tap connected to two tubes in an ether container. One of the tubes reaches well below the surface of the ether...