HEYL STAINS 



The time has passed when the bacteriologist will buy stains on the mere assurance of the 

 advertiser that his stains are biologically controlled by expert supervision. 

 The past five years have demonstrated who is who in the production of reliable microscopic 

 stains — the kind the bacteriologist was accustomed to, before the war shut off importation. 

 The secret of HEYL STAINS may be found in the long technical and practical experience 

 of the bacteriological chemist who prepares and adjusts their mixtures. 



HEYL STAIN SPECIALTIES 



METHYLENE 



(25% polychrome) 



METHYL GREEN 



(Indicator) 



GENTIAN VIOLET No. 2 



(Kolle-Hetsch) 



NEW WRIGHT STAIN 



ISAMINE BLUE 

 MAY-GRUNWALD STAIN 



TOLUIDINE BLUE 



(Unna) 



PYRONIN G 



(Pappenheim) 



METHYLENE VIOLET 



DAHLIA VIOLET 



PYRROL BLUE 



(Cassella) 



EHRLICH'S VITAL RED 



TRYPAN BLUE G 



(Veterinary Antiseptic) 



FUCHSINE (NEW) 



(for Endo) 



LAUTH'S VIOLET 



THIONINE (LV) 



TRYPAN RED 



ANILIN-BLUE-BLACK 



(Griibler) 



(Sold in 1, 5 and 10 Gm. vials and 1 pound original bottles) 



HEYL STAINS are obtainable thru most of the principal dealers at a price consummate 

 with their quality and reliability. 



When ordering stains specify: HEYL 



HEYL LABORATORIES, INC., NEW YORK CITY, U. S. A. 



.^ 



Will Shaking Machine ^SiiZV^r""' 



Haemacytometer Pipettes, Test Tubes, Flasks, Bottles. 



Especially valuable in diagnostic and clinical laboratories for such operations as the emulsification of sputum, 

 estimating urobilin, determination of lactic acid in gastric contents, preparation of vaccine and bacterial ex- 

 tracts, in sero-diagnostic work, and many other operations where shaking is essential. 



Mechanical shaking is exact, time-saving and superior to hand manipulation in every way. 



A splendid adjunct to the modern clinical laboratory. 



WiTl"Corporation 



Products for Every Laboratory 

 Guaranteed \\1thout Reservation 



R oCHESTEW,. W . Y 



