TY  - JOUR
T1  - On the Focometry of Lenses and Lens-Combinations, and on a New Focometer. 
JF  - Proceedings of the Royal Society of London (1854-1905)
VL  - 49
SP  - 225
EP  - 227
PY  - 1890/01/01/
UR  - http://dx.doi.org/10.1098/rspl.1890.0087
M3  - doi:10.1098/rspl.1890.0087
AU  - Thompson, S.
ER  -
