THE ALUMNI JOURNAL 75 



The vellow coloring- matters have also been examined. r>erzelins 

 fonnd a yellow substance and called it Xanthophyll. Arnaud foun<l 

 another substance and named it Carotin. Willstatter isolated them 

 and examined them. He found the formula for Carotin to be 

 C40H.0. a hydrocarbon (Cenzin extraction). Xanthophyll is obtained 

 by precipitation from alcoholic solution with petroleum benzine. It 

 crystallizes readily, forms red plates. Its formula is C^oHq^Oo. We 

 have here a simple relation to carotin. Xanthophyll is its oxide. Both 

 are unsaturated and absorb oxygen readily even by mere exposure 

 to air. They probably are the vegetable oxygen carriers. 



NEW BIOLOGICAL LABORATORY. 



A handsome building has recently been added to the group of 

 biological laboratories of H. K. Mulford Company at Glenolden, Pa. 



The building is constructed entirely from basement to roof of hollow 

 tile and concrete, making it a fireproof structure throughout. 



It is divided into departments, each department being a unit, and 

 complete in itself. The east end of the building is devoted to the 

 handling of serum and globulin products. On the first floor bleedings 

 are received from the bleeding room, serum or plasma is removed 

 from the clot or from the corpuscles, as the case may be, and the 

 product stored immediately in cold-storage rooms belonging to this 

 group. 



The entire plant is arranged and managed under the unit system. 

 A separate building or group of buildings, or in some cases portions 

 of larger buildings, are devoted to the preparation, standardization, 

 packing and shipping of each product. Each unit is in charge of 

 scientific experts in their particular branch of bacteriology. Cold- 

 storage rooms supplied with cold air from a central refrigeration plant 

 form part of each individual unit arrangement. This makes it possible 

 to keep on hand a large stock of biologicals without danger of deterior- 

 ation, so that the Company is prepared at all times to supply these 

 products and to cope with the enormous demands often created by 

 epidemics of the various infectious diseases. 



