ON CERTAIN FORMS OF INTERPOLATION. 
443 
AFTER INTERPOLATION TO THIRDS BY (19). ` For INTERPOLATION TO EVERY 2 
= | Hours nx (9"). 
Date. DA Function. | T RP P E of 
d T i n CC n i n | gur 
Apr. 27 20 : 58 584 
28 0| [3 $01 | 58 568 ap er: —1184 2 —99.6 e? 
4 7| 61 565 117.0 | t 29.3 —29. 
T DA 1.9 29.1 
8 62 59.2 115.1 28.8 
—D0 59.4 —0 52,4 1.9 28.6 
19 62 6.8 1185.2 28.8 
2 45.6 2 45.6 2 28.0 
16 09 21.2 110.8 217.4 
i 4 36.4 9.0 27.4 
20 6 947 54 44:8 ` 6 24.7 108.3 49.5 2441 26.7 
29 0 ucg 10.5 48 20.1 8 10.5 —105.8 7 —26.4 ta 
29 4 s 40 9.6 m o : 
INTERPOLATION BY USING (25), AND THEN (26). INTERPOLATION BY USING (19), AND THEN (97). 
Date. 9 Tasta. $ Function. 
d h darda PO p UM 1 l 
Apr. 28 0 41446 58 56.8 41 446 58 56.8 
2 E lo 60 41.4 60 41.4 
1 15.1 Ce 1 15.1 
4 ^r 61 56.5 61 56.5 
0 45.9 ; 0 45.9 
6 62 42.4 62 42.4 
+0 16.9 +0 16.8 
8 62 59.3 62 59.2 
DO —0 11.9 
10 62 47.3 i 62 47.8 
0 40.5 0 40.5 
12 ] 27 62 6.8 ies 62 6.8 
14 7 60 58.1 y 60 58.0 
1 36.8 1 36.8 
16 59 21.3 59 21.2 
2 X5 2 45 
18 57 16.8 57 16.7 
KEE 2-819 
20 54 44.9 54 44.8 
22 2 59.0 51 45.9 de 51 45.8 
29 0 T3 25.8 48 20.1 ee A8 901 
E A A ELT. 
INTERPOLATION TO FIFTHS BY (107), (97), Awp;(SU. — 
Date. Function. 
ax d "n Vë D 
Apr. 27.9 T2 44.57 A 568 
28.0 2 1.93 60 58.7 
28.1 1 19.60 62 18.3 
28.2 +0 37.62* 62 55.9 
28.3 —0 3.98 62 52.0 
28.4 0 45.16 62 68 
o. 1 25.89 e 
ECK 2.614. 58 34.8 
28.7 2 45.88" 55 4839 
(988 3 25.08 m 
52 23.8 
29.1 Berg 38.: 
* "These are the independent values derived from the original differences. 
