1. Movements of the Leaflets. 
At night the leaflets ses vertically downwards, so that their under- 
surfaces are approximated. is is the sleep pere During the day 
the leaflets are more or less raised, making various angles "with the 
vertieal. Commonly during the day they approxima to the horizontal, 
beyo 
upper surfaces are separated by an angle of only 45° or 30°, as, for 
horizontal Mr. Nowack speaks oase negative ": those above, as 
as 
tive. 
fundamental, and as indicating 48 hours ahead fine or wet weather 
respectively. The horizontal position is for change ; and if the leaflets 
adually move upwards from this position into a “ positive ” position, 
a forecast of the weather 48 hours ahead is make for * clearing up," 
« fair weather," or even “ fine and cloudless,” according to the intensity 
of the aaite movement (as judged by the height to which the leaflets 
In a precisely similar manner a sinking of the leaflets indicates 
an “ overcast t sky,” “probable rain,” or “heavy rain,” the position for 
the last being almost coincident with the sleep position. 
All these movements may be performed with the axes of the leaflets 
at right angles to the main leaf-rachis (indicating calm weather), or the 
leaflets ma less than_90° with the 
distal part of the rachis. These a ngles are regarded as indicating the 
intensity of the wind ; the smaller the angle, the ar tal the wind. A 
* fresh to strong " wind is indicated by an angle of about 45°, These 
are combined with positive or negative or horizontal positions of the 
leaflets ( iu to “fine weather with wind” or “wet weather with 
wind,” &c.). 
direction of the wind is obtained by noting in which alt 
the leaves era by this part rtieular phase of movement point; the 
changes in direction by noting the sequence in which this forest 
inclination of the ebd appears on them. 
Electrical disturbances are indieated in two ways :— 1 
siders to foretell * presence of ele eetrieity i in the 
necessarily thunder and vi eei. (2. By a potiti curving of the 
leaflets, each leaflet being co E above; concave below. ‘This move- 
ment may be called “ rolling’ T ofi the leaflets. This “ rolling” sd shown 
inclined to one ánod i an angle of, say, 90°, their spicis, 1 
o lie 
almost touch or even overiap. This “rolling” foretells thunder and 
reader po the locality or some distance away, according to the relative 
age of the leaves on which it occurs 
Since his arrival in England Mr. Nowack has found that fog or mist 
is prophesied by irregular positions of the leaflets indistinguishable from 
ee indicating “electricity in the atmosphere.” The more strongly 
arked the irregularity the denser will be the mist, It is on account < 
this similarity of the indications that Mr. Nowack, in forecasting weat 
‘ound himself unable to distinguish between “electricity " ad 
© fog.” ipee is the explanation of such dubious foreieseis as that for 
