76 DK. R. MULLINEUX WALMSLEY 



scopes for advanced and research work. The new Committee, assisted, 

 as was its predecessor, by manufacturers and distinguished users of 

 the microscope — and for their assistance at both Committees the 

 Guild is very grateful indeed^ — produced a specification for a student's 

 petrological microscope, another one for general use in chemical 

 laboratories, the cost of which was not to exceed £3 at pre-war prices : 

 and, finally, a microscope for metallurgical work, in connection with 

 which it had the assistance of distinguished metallurgists. These 

 specifications were published during 1916 and circulated, but the 

 trade determined that during the continuance of the war nothing 

 could be done in the direction of standardisation until more quiet 

 times came. The interval was not altogether lost, for these draft 

 specifications were subject to criticism, and amended specifications, 

 embodying considered modifications, have been drawn up, which we 

 hope will be satisfactory to the trade and to users. The specifica- 

 tions will be published shortly. 



