16 BULLETIN 451, U. S. DEPAKTItfEXT OF AGKICULTUKE. 
The finished solution, drawn off from the sediment, should theo- 
retically contain 18 per cent (grams per 100 c. c.) of sulphid sulphur, 
but probably will contain somewhat less. It is. therefore, appro- 
priate for dipping sheep at a dilution of 1 volume of concentrate to 
9 or 10 volumes of water, and for cattle at a dilution of 1 volume of 
concentrate to 7 or 8 volumes of water. But in any event, since 
baths lose strength during dipping, it is very desirable to keep them 
at all times under control by means of a " field test." 10 
The particular advantages of the above formula are. first, that it 
closely approaches the theoretical ratio, making allowance for im- 
purities: second, it is as concentrated" a product as can be prepared 
without conversion of thiosulphate to sulphite ; and third, the figures 
are easily remembered and readily converted into the quantities of 
ingredients necessary to prepare a batch oi ny desired size. 
In deducing a formula for the preparation of highly concentrated 
proprietary solutions it is evident that the manufacturer must make 
a few trial runs with plenty of sulphur in order to establish the 
conditions which will uniformly yield the product he desires, analysis 
of which will then inform him. by how much he may safely reduce 
the sulphur to allow for the formation of sulphite. 
REFERENCES TO LITERATURE. 
1. Chapin, Robert Macfaelaxe. Some new methods for the analysis of lime- 
sulphur solutions. Jrn. ind. and eng. chern., v. 8, no. 2, p. 151. New 
Tork, Feb., 1916. 
2. Chapix, Robeet aTacfarlaxe. New methods for the analysis of lime-sulphur 
solutions, II. The estimation of poly-sulphur. Jrn. ind. and eng. chem., 
y. 8, no. 4, p. 339. New York, April, 1916. 
3. Lixdet, L. and Beasabt. Sur l'emploi des phenols au dosage des alcalino- 
terreux. Application au controle des iaits de chaux in sucrerie. Bul- 
letin Assoc, chim. sucr. et dist., t. 27, no. 10, p. 933-936. Paris. April, 
1910. Abst. in Jrn. Soc. chem. ind., y. 29. no. 10, p. 643. London, May 
31, 1910. 
4. Diyees, Edwaed, and Shimidzu, Tetsvkichi. On calcium hydrosulphides. 
Jrn. Chem. soc, y. 45. p. 270-291. London, 1884. 
5. Van Slyke, L. L.. Hedges, C. C, and Boswoeth, A. W. A chemical study of 
the lime-sulphur wash. New York Agr. exp. sta., Bui. 319, p. 3S3-41S. 
GeneYa, Dec, 1909. 
6. Kuster, F. W., and Hebeeleix. Eduaed. Beitrage zur Kenntnis der Poly- 
sulfide. Ztschr. anorg. chem., Bd. 43, Heft 1, p. 53-84. Jan. 16: Bd. 44. 
Heft 4, p. 431-452. April 4. Leipzig, 1905. 
7. Haywood, J. K. The lime-sulphur-salt wash and its substitutes. U. S. Dept. 
Agr., Bur. Chem., Bui. 101. 29 p., Washington, 1907. 
8. Atjid, Samuel James Manson. The reaction between calcium hydroxide and 
sulphur in aqueous solution. Jrn. Chem. soc, v. 107 & 108, no. 630, 
p. 4SM-495. London, April. 1915. 
9. Imes. Marion. Sheep seal). U. S. Dept. Agr.. Farmers' Bui. 713. 36 pp. 
Washington, 1916. 
10. Chapix. Robert M. A field test for lime-sulphur dipping baths. U. S. Dept. 
Agr., Bui. 163. 7 pp. Washington. 1915. 
WASHINGTON : GOVERNMENT PRINTING OFFICE : 1916 
