MAC MICHAEL VISCOSIM 



No. 7367 SC 



IMPROVED FORM NOW READY 



ER 



■i 



•| ting of 



Particularly adapted for 

 varnishes and glues, esp(^ 

 glues. Used by research 

 special tests on oils. Empl 

 testing a wide variety of r^l 

 viscosity range being fromlj 

 thinnest liquid up to the t| 

 The Mac Michael Viscosimi 

 able, weighing only about twenty-five 

 pounds, and is of rugged construction. 

 It is easy to operate and tests can readily 

 be made by those who have no technical 

 experience. 



The rate of rotation of the cup can be 

 regulated at will up to about 120 r.p.m. 

 The motor is universal, so that only the 

 voltage need be specified. Heating is 

 accomplished through the electric heat- 

 ing plate. 



Experiments are being conducted looking 

 toward the standardization of the entire 

 range of torsion wire used. The operator 

 .can standardize the lighter wires against 

 'sugar or other solutions of known 

 strength. The dimensions of the cup and 

 of the cylindrical plunger conform to the requirements for c.g.s. units. 

 Above the dial is a wheel by means of which the dial can be turned back a known 

 number of degrees, so that for very exact reading its position can be indicated on 

 the scale of a reflecting telescope by attaching a mirror to the spindle. 

 A bulletin is being prepared which will incorporate the results of the various tests 

 and give full details. 



In ordering advise voltage of electric current and approximate range of viscosity 

 of the materials to be tested, so that suitable torsion wires can be supplied. 



msnd 



NEW YORK CITY 

 3rd Atb^ 18th— 19th St. 



PITTSBURGH BRANCH 

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