Notes. 
170 
Syringa vulgaris after twelve hours’ immersion the weight increased 4-4 per cent., 
whilst the NaCl content increased 3*6 per cent. In Arum maculalum the weight 
decreased 2-09 per cent., while the NaCl content increased 5-75 per cent. The 
cells were not killed by this treatment. 
Acer Pseudo-platanus. When grown six miles from the sea, on land which 
sloped very gradually seawards, the leaf-ash contained 0-32 per cent. NaCl. The 
plant in this situation was exposed to all the winds from the west, i. e. from the sea. 
In analysis VIII the leaf-ash contained 0-37 per cent. NaCl., i. e. only 0-05 per cent, 
more than in the former case, and this ash was obtained from a plant grown 
440 yards from the sea but sheltered by buildings from all sea winds. In analysis VII, 
the leaf-ash contained 0-43 per cent. NaCl, and in this instance the leaves were pro- 
cured from a tree growing one mile from the sea, the land between being level. 
Analyses IX and X show that the ash of the leaves obtained from two plants of the 
same species, both grown 400 yards from high-water mark, contain respectively 
0-57 per cent, and o *66 per cent. NaCl, the former having been got from a plant 
slightly sheltered by sandhills from the sea winds, while in the latter case the plant 
was fully exposed. The leaves in all these cases were gathered during the end of the 
month of June, 1912, and the durations of the different winds during that month were 
as follows : 
North 
North-east 
East 
South-east 
= 49 hours 
= 33 » 
= 73 » 
= 9 ° >, 
South 
South-west 
West 
North-west 
97 hours 
9 8 » 
197 „ 
S3 „ 
(From the Records of the Southport Observatory.) 
Ulmus campestris demonstrates even better the fact that the leaves obtain their 
supply of sodium chloride from the atmosphere. The table shows that the amount 
of NaCl found in the leaf-ash varies from 0*37 per cent, to 1*74 per cent, when pro- 
cured from trees grown six miles inland and 400 yards from the high-water mark. 
In analysis II the ash was obtained from a plant growing one mile from the sea, the 
land between being level; it contained 0-71 per cent. NaCl — twice as much as in 
analysis I ; but in analysis IV the ash was obtained from a plant growing two miles 
inland, and in this case it contained 1*02 per cent. NaCl. This excess is explained 
by the fact that the plant grew on the west side of Bidston Hill, Cheshire, and was 
exposed to much wind. The ash from the leaves of the same species grown 
440 yards from the sea but sheltered from sea winds contained only 0*50 per cent. 
NaCl. The leaves in all these cases were gathered during the end of June, 1912, and 
the total durations of the different winds were the same as described under Acer 
Pseudo-platanus except in the case of the Bidston Hill plants, which were examined in 
May — analysis IV. In the last case the number of hours that the wind blew from 
each compass point was : 
North 
30 
South 
9 1 
North-east 
18 
South-west 
133 
East 
39 
West 
217 
South-east 
125 
North-west 
67 
(From the Records of the Bidston Observatory.) 
