102 
IOWA ACADEMY OF SCIENCES. 
lege, and as this paper is to be made the basis for future 
work a bibliography of diphenyl ethers is here appended. 
BIBLIOGRAPHY. 
(1) Ann. 90, 209. — List and Limpricht obtained diphenyl 
ether as one of the products of the destructive distillation 
of copper benzoate. 
(2) Ann. 125, 328. — Rudolph Fittig obtained diphenyl 
from the above mentioned distillate. 
(3) Ann. 138, 375.— C. Lesimple obtained a compound 
by distilling phenyl phosphate with lime, which he called 
phenyl ether. 
(4) Ann. 159, 191, and Ber. 3, 747. — W. Hoffmeister pre- 
pared phenyl ether by treating diazo-benzene sulphate 
with phenole and made a thorough study of the com- 
pound. 
(5) Ber. 23, 3709. — Hirsch varied Hoffmeister’s method 
and greatly increased the yield. 
(6) Ber. 6, 564. — Maikopar made a dinitro derivative by 
acting on dinitro chlor benzene with an alcoholic solution 
of potassium hydroxide and phenol. 
(7) Ber. 13, 887. — Willgerodt prepared a tetra nitro- 
derivative by heating dinitro-potassium phenolate with 
dinitro-chlor benzene in a sealed tube. 
(8) Ber. 14, 187. — Merz and Weith prepared pheny 
ether by heating phenol with zinc chloride, and also 
aluminum chloride (see also correspondence, Ber. 12, 1925.) 
(9) Ber. 15, 1123. — Mederhausern prepared methylene 
diphenyl-oxide by distilling sodium phenolate with sodium 
meta-phosphate. 
(10.) Ber. 17, 1764. — Willgerodt and Huetlin prepared 
derivatives by acting on potassium phenolates with dinitro- 
chlor benzene and pikryl chloride. 
(11) Ber. 17, 2638. — Bausch prepared a dimethyl deriva- 
tive by heating para-cresol with zinc chloride. 
(12) Ber. 29, 1446. — Haeussermann and Teichman pre- 
pared various derivatives by acting on halogen-nitro ben- 
zene derivatives with potassium or sodium phenolates. 
