Table shotting the Number of Dust Particles in the Atmosphere of Different Places. 
1888 - 89 .] 
Mr John Aitken on Dust Particles. 
167 
Remarks. 
Foggy morning. 
Air thick, but clearing. 
Been raining for two hours. 
Been wet night, air thick. 
Air extremely thick, raining all day. 
Been slight shower, air much clearer. 
Air clear, day bright and fine. 
Frosty night, dull thick morning. 
Air become very thick. 
Air getting clearer. 
Fine clear, bright morning. 
Clear and bright, slight wind. 
Greatest number observed here. 
Smallest number observed here. 
Air clear, passing snow showers. 
Fair, but air thick. 
Day fair, with clear air. 
Strong north-west gale, air clear. 
Strong north-west gale, air clear. 
Frosty, sky clear. 
Wet morning, windy and wet day. 
4 feet from floor, before meeting. 
4 feet from floor, near end of meeting. 
Near ceiling, before meeting. 
Near ceiling, near end of meeting. 
4 feet from floor, beginning of experiment. 
4 feet from floor, after gas burning two hours. 
Near ceiling, at beginning of experiment. 
Near ceiling, after gas burning two hours. 
Air clear, day fine. 
Air clear, day fine. 
At 4 feet from floor. 
Near ceiling. 
At 4 feet from floor. 
Near ceiling. 
At 4 feet from floor. 
Near ceiling. 
Wind. 
r-t I— t (M « ... 05 
H = ^ : : : : i i : : ~ : : = : E : 
02 02 02’ 02 W 02 ^ ^ 'A ^ 02* ^ 
Number of Particles 
per c.in. 
87,740 
41.000 
83,620 
90,200 
155,800 
27,060 
8,200 
75,440 
151,700 
69,700 
10,250 
82.000 
2.296.000 
180.400 
1.230.000 
4.100.000 
738.000 
3,739,200 
2.788.000 
5.453.000 
7,642,400 
4.510.000 
6.560.000 
49.200.000 
57.400.000 
2.050.000 
4.510.000 
29.520.000 
37.720.000 
451.000 
639,600 
470,680 
426.400 
13.120.000 
28.700.000 
8.200.000 
45.920.000 
Number of Particles 
per c.c. 
OOOOOOOOOOUOOOOOOOOOOOOOOOOOOOOOOOOOOO 
lOOu^OOiCOO^iOC^OOOOOOOOOOOOOOOOOOOOOOOOOO 
CO iO^O *c>»oo*oo<m<moo 0^0 O 0^0 0^0^ U^OO 0^0^ 0^0 0^0 0^0 o O O o o 
iq oT of iq of r-T rjT cT i£ o~ r-T *cT cP go" o' oT o' i^T o' o' o' xP *£ o" o" r>7 cP cc o o" o' o" o' 
Tt<HhiO^(Nt>iCOCOhOOO(NNOO(NWNClOiOOO 
rH <M Cl H CO ^ Cl ^ O rH d CC CO 00 t>> *0 CO 
CO CO rH <>T I—T CsT 
Hour. 
10 A.M. 
2 P.M. 
5 P.M. 
11 A.M. 
5 P.M. 
12 A.M. 
1 P.M. 
10 A.M. 
3 P.M. 
11 P.M. 
10 A.M. 
11 A.M. 
10.30 A.M. 
1.30 P.M. 
3 P.M. 
1 P.M. 
11 A.M. 
11 A.M. 
2 P.M. 
3 P.M. 
1 P.M. 
7.45 P.M. 
9.30 p.M. 
7.45 p.m. 
9.30 p.m. 
10.45 A.M. 
1 P.M. 
10.45 a.m. 
1 P.M. 
1 P.M. 
3 P.M. 
3 P.M. 
3 P.M. 
4 P.M. 
4 P.M. 
5 P.M. 
5 P.M. 
Date. 
NhhCCCOOOHHH?HOQOClC1^0QOCOCl^^^^TjiiOiOOiOa5C50CJOCiOO 
>. HHHHriH St: 
es *a § 
a """ ~ 
03 o <u 
'-s O tn 
Place. 
Colmonell, 
Baliantrae, 
Falkirk, 
Edinburgh, 
}) , • • • 
Glasgow, 
Meeting-Room, 
>> • • * 
,, . • 
Falkirk, ! ! 
Room, 
