junei7, i9i8 Effects of Chemicals on Virus of Mosaic Disease 625 



Table I. — Effects of various chemicals on the infectiviiy of the virus of the mosaic 

 disease of tobacco — Continued 



CARBOUC-ACID SOLUTIONS, CARBOLIC-ACID SOLUTIONS CONTAINING I PER CENT OF 

 SODIUM CHLORID, AND PURE SODIUM-CHLORID SOLUTIONS 



CREOLIN (pEARSOn) SOLUTIONS 



CRESOL" SOLUTIONS 



CARBOLIC-ACID SOLUTIONS AND PHENOCO ^ SOLUTIONS 



I gm. of carbolic acid to 50 c. c. of 



virus solution. 

 I gm. of carbolic acid to 100 c. c. of 



virus solution. 

 I gm. of carboUc acid to 200 c. c. of 



virus solution. 

 I gm. of carbolic acid to 400 c. c. of 



virus solution. 

 I gm. of phenoco to 100 c. c. of virus 



solution. 

 I gm. of phenoco to 200 c. c. of virus 



solution. 

 I gm. of phenoco to 400 c. c. of virus 



solution. 



Feb. 20, 1917'^ 

 do 



...do 



do 



....do 



....do 



....do 



Mar. 7, 1917 (15 



days later). 

 do 



.do. 

 .do. 

 .do. 

 .do. 

 .do. 



10 Connecticut 



Broadleaf. 

 ....do 



.do. 

 .do. 

 .do. 

 .do. 



10 plants mosaic. 



Do. 



Do. 



Do. 

 7 plants mosaic. 

 9 plants mosaic. 



Do. 



a A mixture of the three isomeric cresols. 



6 Phenoco is a commercial disinfectant composed of emulsifietl phenol homologues and neutral tar oils. 



c Prepared with fresh, imfiltered virus. 



