8 BULLETIN 13 90, U. S. DEPARTMENT OF AGRICULTURE 
(9) Leipziger Axilixfabrik Beyer & Kegel. 
1885. verfahrex zur zerleguxg der armstroxg'schex /3-xaphtol- 
monosulfosaure in zwei isomere naphtolmonosulfosau- 
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entschriften (32,901-33,000) 1885. Berlin. [Not paged.] 
(10) Limpach, L. 
1886. VERFAHREX zur trexxuxg DES ROH-XYLIDIXS IX DIE fur die 
farbexteckxik wichtigex isomerex. Patentschrift 39,947. 
Kaiserliches Patentamt. Patentschriften (39,901-40,000) 1886, 
illus. Berlin. [Not paged.] 
(11) Society of Dyers axd Colourists. 
[1924.] colour ixdex. 370 p. Bradford, Yorkshire. 
(12) United States Department of Agriculture. 
1927. CERTIFICATION OF COAL-TAR FOOD DYES. U. S. Dept. Agr., 
S. R. A., F. D. No. 3. 
(13) Wetter, J. 
1885. A PROCESS OR PROCESSES for separating the different beta- 
NAPHTOLMONOSULPHO-ACIDS FROM A MIXTURE OF THE SAME,. AND- 
for obtaining colouring matters therefrom. (Communi- 
cated from abroad bv Leipziger Anilinfabrik, Bever and Kegel.) 
British Patent 7098 (1884). In Specifications of Inventions 
(1884) 36 (7001-7200'), 3 p. London. [Separately paged.] 
(14) Witt, O. N. 
1885. VERFAHREX ZUR TREXXUXG DER IM HAXDEL XYLIDIX EXTHALTENEN 
isomerex. Patenschrift 34,854. Kaiserliches Patentamt, 
Patentschriften (34,801-34,900) 1885, illus. Berlin. [Not 
paged.] 
', 
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