J20 



Omitted were all incomplete observations and those about the 

 moon. 550 Observations vvei-e at my disposal, divided over the six 

 years as follows : 



1910 J911 1912 19J3 1914 1915 Total 

 colour-records 1 25 (6) 107 (7) 114 (7) 81 (8) 66 (8) 57 (7) 550 



total 473 480 399 283 325 377 2337 



7„ 26 22 29 29 20 15 24 



In parenthesis is mentioned the number of observers. 



The row "total" gives the total number of records taken from 

 "Thunderstorms". 



The fourth part of all the notes gives reliable records. 



31 Colours and colour-groups are mentioned, among which three 

 very anomalous ones: blue IX; violet, red VIII ; red, violet, green V. 

 In the first communication are mentioned ^) golden brown (red), 

 yellow, green, violet (3 times by two observers) ; yellow, violet ; 

 golden brown, clear white, blue. 



All the colour observations (divided over the two circles, the 

 tangential arcs and the circumzenithic. arc) are contained in the 

 table I. (See table following page). 



In the table the personal character comes out strongly. 



144 observations of red by 10 observers (among which 115 ot 

 VII and IX), and 133 orange by 5 (among which 130 of V and 

 X) where in most cases the same colour is meant, this clearly points 

 to the personal estimation of this colour. The same is evident in 

 the groups red-white and orange-white. 



The table II also gives an idea of this individual opinion. (See 

 table II page 122). 



All the colour records of each observer, separately for the ordinary 

 circle, the parhelion and the tangential arcs have been collected 

 without further observations in this table. From this it appears, that 

 the records of V, VII and X are limited to green (V has one 

 observation of violet on a total number of 158). Ill also mentions 

 blue, but never violet; VIII notes neither green nor blue, but 

 in 22 records 12 times violet. 



This phenomenon however interesting from a physiological point 

 of view, greatly diminishes the value of the records, but without 

 doubt green and blue colour shades often occur, as is further 

 evident in the percentages of the separate colours in the following 

 table (in which parhelion and tangential arc are taken together). 



1) I.e. p. 1330 seq. 



