AND INDUSTRY 9 



At first we were in despair. The limits of 

 accuracy which the Inspection Department 

 fixed were extremely narrow in some cases 

 only three ten-thousandths of an inch. Rejec- 

 tions were very numerous ; to supply the re- 

 quirements appeared impossible, but now 

 gauges are examined at the rate of about 

 10,000 a week, and some 80 per cent, pass as a 

 matter of course. Some firms get practically 

 all their gauges through. Careful scientific 

 examination of the causes of error, improved 

 methods of manufacture and a firmer grasp 

 of the essentials have produced this change ; 

 the standard of manufacture has been grad- 

 ually improved, and results at first thought 

 unattainable have been realised. 



Physics and Engineering would afford 

 many other instances, such as improvements 

 in means of signalling, wireless telegraphy, 

 sound ranging and weather prediction. 



