206 Scientific Proceedings, Royal Dubiin Society. 
Pettersson, O.: 
‘“ Luftanalyse nach emem neuen Princip.” 
O.P. Fresenius’ Zeitschr. 2 [1886], p..467. 
Abs. Chem. Centrbl. 18 [1887], p. 22. 
Pettersson, O., and A. Hégland : 
&¢ Zur Analyse der Atmosphire.” 
O.P. Berichte, 22 [1889], Bd. 2, p. 3324. 
Abs. Chem. Soc. Journ. Ads. 58 [1890], p. 412. 
»5 Chem. Centrbl. [1890], Bd. 1, p. 292. 
Pettersson, O., and A. Palmquist : 
(1) * Ein tragbarer Apparat zur Bestimmung des Kohlensiurégehaltes 
der Luft.” 
O.P. Berichte, 20 [1887], Bd. 2, p. 2129. 
Abs. Chem. Soc. Journ. Ads. 52 [1887], p. 999. 
», Chem. Centrbl. 18 [1887], p. 1364 (notice only). 
», Fresenius’ Zeitschr. 27 [1888], p. 382. 
(2) “Apparat sur Bestimmung des atmosphirischen Kohlensturegehaltes.’ 
O.P. Wollny’s Forsch. 16 [1893], p- 178. 
Petersen, P.: 
“ Hinfluss des Meigels auf die Bildung von Kohlensdure im Boden.” 
O.P. Landw. Vers. Stat. 13 [1870], p. 155. 
Phipson, T. L.: 
(1) “ The constant production of oxygen gas by means of Protococcus 
pluvialis, and the action of the sun’s rays.” 
O.P. Chem. News, 48 [1883], p. 208. 
Abs. Chem. Soc. Journ. dds. 46 [1884], p. 201. 
(2) ‘* The chemical constitution of the atmosphere from remote geologrcal 
periods to the present time.” 
O.P. Chem. News, 67 [1893], p. 135. 
(3) ‘* Origin of oxygen in the earth's atmosphere.” 
O.P. Chem. News, 68 [1893], p. 45. 
(4) ‘‘ The chemical history of the atmosphere.” 
O. P. Chem. News, 68 [1893], p. 75. 
Abs. Biedermann’s Centrbl. 23 [1894], p. 848. 
(5) ‘Vegetation in an atmosphere devoid of oxyyen, and considerations 
on the dawn of animal life.” 
O. P. Chem. News, 68 [1893], p. 259. 
(6) ‘* Sur Porigine de Voxygéene atmosphérique.” 
O.P. Compt. Rend. 117 [1893], p. 309. 
(7) ‘* Sur la constitution chimique de U atmosphere.” 
0. P. Compt. Rend. 119 [1894], p. 444. 
Abs. Chem. News, 70 [1894], p. 148. 
»»  Biedermann’s Centrbl. 24 [1895], p. 625. 
(8) ‘‘ Free oxygen in the atmosphere.” 
O.P. Chem. News, 70 [1894], p. 223. 
