84 G. H. KNIBBS. 
the efflux method. In 1876 Sprung! made a series of experiments 5 
with water in connection with his physico-chemical resent 
The following year Meyer communicated the results of ie 
cranz’s? observations, the latter having died at Breslau in Febru ; 
of that year, i.e. in 1877. Rosencranz’s investigation, ce which | 
measurements up to 90° C. were made, had for its object tt 
extension of the values of the viscosity coéfficient beyond Poiseuille | 
limits, with the view of ascertaining how far Poiseuille’s formtly ) 
accurately expressing the effect of temperature under a 7 
algebraic form, could be safely extrapolated. a 
The viscosity research in the department of chemical alas | 
was continued by P¥ibram and Handl? in 1878 and 1879, s08¥am 
Grotrian* in 1879, the latter furnishing further observations y 
the efflux method, and drawing attention to an analogy aie 7 
fluidity and electric conductivity. Slotte® in 1881, and. Wag? ] 
in 1883, the latter continuing a line of physico-chemical research 
commenced by him in 1876, both supply efflux measurements foe 
3 
: 
: ; ‘ corte eas intern | 
water made in connection with their investigation of the 1 : 
frictions of chemical solutions. 
In the year last mentioned, Reynolds’? demonstrated afresh : 7 
the law of flow in capillary tubes held also for larger tubes, provi 4 
Oe ee 
| Experimentelle Untersuchungen iiber die Flissigkeitsreibums © 
Salzlosungen, Bd. 159, p. 1- 35 
Meyer.—Wied. Annal. Bd, 2, p. 387-406, 1877. ? 
$ Ueber die specifische Zahigkeit der Fliissigkeiten und ihre Bezieb" 
zur chemische Constitution.—Sitzber. k. k. Akad. Wien. Bd. 78, AP 
p. 113 - 164, 1878, and Bd. 80, Abt. 2, p. 17 - 57, 1879. 
* Analogien zwischen der Fluiditit und dem galvanischen Lett™’ 
vermigen.— Wied. Annal ; 29 — 554, 1879 
5 Ueber die innere Reibung der Lisungen einiger Chromate.—W* 
Annal. Bd. 14, p. 13 — 22, 1881. 
6 Ueber die Zihigkeit von Salzlésungen.—Wied. Annal. Bd. * : 
259 - 289, 1883 
7 An experimental investigation &c., &c., and of the law of resistal™ 
in parallel channels.—Phil. Trans. Vol. 174, p. 935, 1883. 
