TY  - JOUR
T1  - On a New Photometer, with Its Application to Determine the Relative Intensities of Artificial Light, &c. 
JF  - Abstracts of the Papers Printed in the Philosophical Transactions of the Royal Society of London (1800-1843)
VL  - 2
SP  - 231
EP  - 231
PY  - 1815/01/01/
UR  - http://dx.doi.org/10.1098/rspl.1815.0253
M3  - doi:10.1098/rspl.1815.0253
AU  - Ritchie, W.
ER  -