RESEARCH LABORATORY : R. S. WILLOWS 125 



but some of the applications of it are very crude. A fourth 

 method appears to be possible, viz., to keep the optical train 

 fixed, but to deflect the light three times at right angles 

 by total reflexion prisms, and so throw it into the vertical 

 illuminator. As the last prism would be a small one, it 

 could well be carried by the moving part of the microscope ; 

 it would not then require adjustment as the microscope is 

 f ocussed . 



(4) It would be a great advantage where the action of solutions 

 is to be followed and recorded, if a horizontal camera could 

 be used when the slide carrying the object is horizontal; 

 this would combine the advantages of a horizontal camera 

 and a vertical position for the microscope tube. I have 

 not seen any attempt at this in an English apparatus. 



In conclusion, may I say that the textile industries in the past 

 have been among the least scientific of the large trades, but the 

 need for research is now fully recognised. In such research the 

 microscope and physical apparatus generally must play an important 

 part. As one who is keenly interested in the technical applications 

 of science, I hope instrument makers will make themselves acquainted 

 with the requirements of the industry and will endeavour not only 

 to meet them, but, if possible, to anticipate them. As a small 

 step in this direction I suggest that The Journal^ of the Textile 

 Institute should find a place on the shelves of their works library. 



