624 
ANNUAL REPORT SMITHSONIAN INSTITUTION, 1911. 
Taste IT. 
| 
Animal. Air.|Air.|Air.| Ozone. aa poe ee poner Remarks, 
Mouse....| Time,in minutes] 15 | 15 | 15 105 L5G als: 15 15 | Ozone 14 parts per mil- 
Loss of weight...|115 |121 |125 185 Sone oo 47 46 lion. Breathing notice- 
HO given off. --/125 |120 |121 |......-. 64] 45 50 55 ably disordered. 
CO given off....| 87 | 90 | 85 |........ D0) ies 30 53 
Do..._.] Time, in minutes] 20 | 20 ¢ 120 20 | 20 20 20 | Ozone 6 parts per million. 
Loss of weight... ./385 |258 499 98 | 93 83 71 Breathing’ markedly 
HeOspiven Otte (152225 |ee | sere oe 225 | 133 Oye ests) disordered. 
COggiven'oit.- 2/101 86. }2222).2-22 30} 21.5 22 24 
Doro Time, in minutes} 20 | 20 | 20 90 208 | FQN es a eye ie Ozone 14 parts per mil- 
Loss of weight.../210 |270 |210 198 S45 | 2150 ecieeeece| nee lion. 
HO given off. ../140 |260 |200 |........ 7AGYOL WAL RCNA oe eel St 
COs given off....|121 |146 |146 |._.-..-- BON OOM JE seeeelies cases 
Dorr e Time,in minutes| 75 |... 25.2: 75 five peeypesel el |S chaise al Ea eae tl Ozone less than 1 part 
Loss of weight. -./415 |_..-}...- 835) |e O4 esa ga eee ea per million. 2 inches 
HO given off. ../303 |....}.... Sad Oe ee eet ee ee from ozonizer. 
CO given off... ./163 }-_..]... 80 OE eoerapetel| alge Se eree 
Do.....| Time, in minutes] 60 |....]...- 60 60 | 60 CON San 28 Ozone well less than 1 
Loss of weight... .|580 |....]...: 515 | 325 | 325 0H bee eaece part per million. 1 
H20 given off. ../425 |....}.... 525, | 337 | 335 BYR clase se foot from ozonizer. 
COe given off. ...1207 }....1.... 64] 150 | 112 D083 slrescte sees 
Doe .2 Time, in minutes} 75 |....}..-- 75 705|" 160) * Skee sites ose Ozone well less than 1 
Loss of weight... ./405 |....}.... 250/i\) S185 e236 a milters eee sec part per million. 100 
HO given off. ..|320 |....|..-- PERI POL 1B. mel ere al lameness em. from ozonizer. 
COz given off..../164 |....].... 123 DA US oy horas eateries 
In all these experiments the 
animals were given a preliminary 
half-hour or so on air, in which to settle down and adjust themselves 
to their new surroundings. Judging by the CO, given off in some. 
cases, the ozone appears to have perhaps a transitory stimulating 
effect, followed by a corresponding depressant effect; in others there 
is but little evidence of any action of the ozone at all at concentra- 
tions such as these. The ozone itself was always in concentrations 
far less than one part per million, and varied from day to day accord- 
ing to the atmospheric conditions prevailing. We should state that 
several of our figures obtained during and after ozone show a R.Q. 
above 1, confirming the observations of Bohr as to the diminished 
uptake of oxygen. 
Turning to the investigation of the respiratory metabolism of man 
under the influence of ozone, we selected the method devised recently 
by Dr. Gordon Douglas,! of Oxford, owing to its simplicity and 
efficiency. 
1C. G. Douglas, Journ. Physiol., 1911, vol. 42; Proceedings, p. xvii. 
