THE PROBLEM OF MITOGENETIC RAYS 943 



ing blood has been tested by exposing the abdominal vein of the female 

 frog covered only with an extremely thin skin. The vein was then 

 exposed to the onion or yeast detector (89). Fresh blood may be tested 

 by mixing it with a 4 per cent solution of MgS04, diluted by an equal 

 quantity of water, and the exposure made in a capillary chamber. Or 

 the blood may be taken up with a piece of filter paper, dried, and ground 

 up with water to a fine pulp (154). Fresh blood must be used as sender 

 within 10 min. after it is taken, if used with MgS04; but it is good for 

 several hours if the filter-paper method is used. During asphyxia with 

 CO or poisoning with HCN, blood will not radiate nor will the blood of 

 starving animals radiate. Blood serum can be brought to radiate by the 

 addition of H2O2 or oxyhemoglobin. 



The blood of man and animals with malignant tumors and serious 

 blood diseases such as poisoning, complicated sepsis, pernicious anemia, 

 and leucemia will not radiate. In cases of lues, Basedow, typhoid, and 

 tuberculosis the blood apparently radiates normally (245). Test of 

 blood taken just after the individual has been doing heavy work shows 

 that radiation has temporarily ceased (Brainess, 28). When the blood 

 of an animal radiates, the urine will also radiate (Siebert, 266). Gur- 

 witsch (108) and Siebert (263) have reported tissues which as yet have 

 been found not to give up mitogenetic radiation. These are lymph nodes, 

 testicles, ovaries, skin, and liver. Muscle tissue is reported to be a very 

 good sender (Frank, 78, 79, Siebert, 264); and also corneal epithelium 

 (Gurwitsch and Anikin, 117), bone marrow (30), nerve tissue, ciliate 

 epithelium, intestinal epithelium, spleen (110). Interesting work 

 has been done on the corneal epithelium, where apparently the radiation 

 depends on the radiation of the blood (for more detailed analysis of this 

 see 117 and 135). Gurwitsch (115) reports that radiation is given up by 

 the cornea and not by the sclera of the eye. Harders (140) finds exactly 

 the opposite regarding these tissues of the eye. A pulp made of muscle 

 will give up radiation if prepared from an excited muscle. A detailed 

 analysis of muscle work has been made by Frank and Popoff (78). 

 Lately a number of publications have appeared on the radiation of 

 the nerve (110, 111, 136, 168, 169). This work has been done by 

 following the spectra of the radiation emitted (see Fig. 6). Whether or 

 not the energy available in the nerve reaction is sufficient has been dis- 

 cussed by Hill (145). 



Protti (218, 219) reports that in the case of senility radiation of the 

 blood disappears, but that when blood of young people has been added, 

 radiation again reappears. This material has been reported in book form 

 (220) and is supposed to be ready for clinical use. 



A large number of biochemical reactions have been found to give 

 mitogenetic radiation and many purely chemical reactions have been 

 designated as good senders. As simple a reaction as the solution of NaCl 



