4(38 
Combating Lousiness 
It rests upon a wrought iron stand and is heated by means of an oil lamp. 
The box is lined with zinc covered interiorly with felt and there is a wire 
grating above the perforated iron bottom. The apparatus is suitable for 
small institutions, and is made in three sizes, Nos. 2-4 1 , the chambers 
measuring respectively 2 ft. I in. x 2 ft. 1 in. x 5 ft. (high) in No. 2, 
2 ft. 7 in. x 2 ft. 7 in. x 5 ft. 3 in. (high) in No. 3, and 2 ft. 9 in. x 2 ft. 
9 in. x 6 ft. 5 in. (high) in No. 4, their weights, when packed, being 
266, 378 and 406 lbs. respectively and the cost ranging from £18. 10s. to 
£35 (at pre-war rates). 
The articles to be disinfected are hung upon hooks sliding on bars 
across the top; the articles should not touch the walls of the chamber for 
Fig. 22. Oil lamp belonging to the “Newman” disinfector. For description see 
footnote 2 below. 
this would lead to their becoming wetted by water of condensation. An 
iron tray containing Id gallons of water and sliding in grooves beneath 
the box is placed in position and the box is closed. The lamp (Text-fig. 22) 
is of a well-known pattern 2 , its flame should play upon the centre of the 
tray causing the water therein to boil quickly. When current steam 
issues from the small sliding grating near the top (in front), the latter- 
should be half closed. The heating is now maintained for 30 minutes, 
after which the tray is removed and replaced by an iron baffle plate, and 
1 “No. 1” is only intended for disinfecting books, etc., by formalin. 
2 To use the lamp or oil furnace (1) unscrew A, nearly fill reservoir E with clean 
paraffin oil, grease the screw and screw down A and then B. (2) Pour two tablespoonfuls 
of methylated spirit into firebox D and ignite it, thereby heating the coil in 2-3 minutes. 
(3) Turn on supply-valve C slowly and regulate as desired. (4) Pump air about six times 
into reservoir E until gauge F registers 20, thus starting the machine; additional pumping 
increases the flame. If the burner becomes choked with dust or carbon, clear it with a 
wire or needle. 
