SCIENCE AND INDUSTRY. 
' 
separate section deals with the important work of high temperature 
measurements. Here, the calibration of various forms of pyrometers 
is dealt with. The ordinary “bill of fare” in the way of commercial 
tests, includes radiation (Féry) pyrometers, optical pyrometers, and 
thermocouples. Important researches on the insulation of cold storage 
chambers have been conducted by Dr. Ezer Griffiths, the acting head of 
this section. It must suffice to pass with merely a mention other small 
sections, namely, Radium and X-Ray, Tide Prediction, and Chrono- 
meter Testing. 
The section devoted to Optics is becoming increasingly important. 
It is housed in part of the administrative building. This section deals 
principally with the testing of optical instruments of all kinds, includ- 
ing nautical and surveying instruments, as well as telescopes, binoculars, 
periscopes, &c. Many original papers on the design of optical instru- 
ments, and on problems allied thereto, have been written by various 
TAXIMETER ROOM. 
members of the staff of this division. In the attempts being made to 
re-establish British optical industries, much will depend on the 
collaboration between manufacturers and the National Physical Labora- 
tory. Important researches.on the manufacture of optical glass are 
being conducted in the Department of Metallurgy and Metallurgical 
Chemistry, under the direction of Dr. Rosenhain. 
The largest division of Physics—now a separate department—is 
Meteorology, of which the superintendent is Mr. J. E. Sears, jun. The 
work comprises measurements of length (including gauges of all sorts 
and descriptions), standardization of weights and barometers, the cali- 
bration of glass-measuring vessels, and the rating of watches and 
chronometers. During the war the subdivision dealing with length 
measurements was enormously enlarged, in order to carry out the cali- 
bration of a large proportion of the gauges required by the Ministry 
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