398 Correction of E'rrors in several Mathematical Tables. 
5th. This state is that of the nervous current, or species of 
discharge which proceeds from the nervous extremities to the 
brain, and returns in a contrary direction by an act of the wi 
6th. When this discharge takes place, muscular contraction 
ought to take place, the fluid ceasing to be free in the muscles. 
7th. This discharge of nervous fluid, acting as in the electric 
fish, explains the induced contraction; in both cases and by the 
same disposition of parts, the nervous current produces a species 
of electric polarization of the elements, either of the muscular, 
or of the electric apparatus ; the difference of effects will be due 
to a different number of elements, to their dimensions, &c. 
8th. The electric current impedes the nervous discharge, if it 
be directed in the contrary direction; as in the direct current: 
the nervous fluid not -being able to enter and accumulate in the 
nerve, this loses its excitability. The contrary takes place for 
the inverse current, which goes in the same direction as _ of 
the nervous discharge : the nervous fluid is found 
the nerve, and its excitability is aug mented. 
Arr. XLVI. eR op of Errors found in ii Mathemat- 
ical Tables; by A. D, Srante 
Ivy compiling a set of mathematical tables, published a few 
months since, several errors were found by the writer in different 
tables which he had occasion to examine. A list of them is 
given —- for the use of those who have copies of the tables 
referre 
parses Table of Logarithms of Numbers: second edition ; 
London, 1831. 
Log. 10354 (p. 6.) The first of the figures 1082 should be m 
small type. 
Log. 60676-7-8-9. The cipher in each of the loga- 
Log. 70634—5-6-7-8-9. rithms should be in small type. 
Hutton’s Mathematical Tables: latest editions. 
Log. 24626, for pag read 3913939. 
In the Traverse Tabl 
Dist. 5, course ab pts. for lat. oe read 3'8651 
«dep. 3°9363 39364 
eo @ 
8 4 16 “ lat. 75642 “ 75641 
CyB MT sot he F196 te FASE 
AQ AE EB te dats 8651S + BOS 
eo Go 8° BQ Hep 4-7098 +» 4°7698- 
&“ tr egg “ dep. 55409 “ 55410 
10 © 16 © lat. 96120“ 96126 © 
#10“ 16 © dep. 276620 27564 + 
