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74
Wednesday Feb 18th 1843 [[vertical squiggly line]] Experiments on parallel wires across the campus
Arrangement the same as before
[[underline]] One jar [[/underline]] higher charge
1
[[following text enclosed in box]]
Spirals NO A NO 1 NO 2 NO 3 NO 4
Defl Needles no 5
+ 50 +25 +35 +37 +42-
[[/end box]]
[[In the left margin]]
Wires at the distance of about 18 inches [[/End of margin note]]
One jar
2 sets spirals
2[[following text enclosed in box]]
Spirals 1st set NO A NO 1 NO 2 NO 3 NO 4
Defl +60 -46 -55 -56 -52
Spirals 2nd set NO A NO 1 NO 2 NO 3 NO 4
Defl -45 -50 -50 -45
[[/end box]]
This result is due to a much [[underline]] stronger charge [[/underline]]
Tried the same with larger needles in one and small in the other set
3
[[following text enclosed in box]]
Spirals 1st NO A NO 1 NO 2 NO 3 NO 4
Defl (needles 5) +65 +58 +45 +28 -22
Spirals 2nd set NO A NO 1 NO 2 NO 3 NO 4
Deflect (Large needles No 2
+56 -0 +6 -18
[[/end box]]
This result is in perfect accordance with my previous results and [[underline]] anticipations [[underline]]
One jar
4 [[following text enclosed in box]]
Spirals NO A NO 1 NO 2 NO 3 NO 4
Def(Needles No 5)
+35 +40 -32 -40 -38
Spirals NO A NO 1 NO 2 NO 3 NO 4
Defl. [[underline]] [[darning?]] need. [[/underline]]
+38 -33 -40 -40
[[/end box]]
This charge was very heavy
jar warm
[[end page]]
[[start page]]
Wednesday Oct 18 1843 [[vertical squiggly line]] Experiments on parallel wire 75
[[underline]] One jar small charge [[/underline]]
[[following text enclosed in box]]
Spirals NO A NO 1 NO 2 NO 3 NO 4
Defl Small needles No 5
+55 +47 +38 +33 +24
Defl [[Darning?]] needles
+55 +38 +34 +18
[[/end box]]
[[underline]] One jar [[/underline]] charged to 60◦ of Electrometer
[[following text enclosed in box]]
Spirals small needles 5 NO A NO 1 NO 2 NO 3 NO 4
darning needles +55 +45 +44 +35 +32
+50 +44 +42 +25
[[/end box]]
[[vertical note in left margin]] Wires at same distance[[/note in left margin]]
One jar charged to 60
[[following text enclosed in box]]
Spirals small needles No 7
NO A NO 1 NO 2 NO 3 NO 4
+45 +40 +37 +28 +2
Darning needles +58 +42 +40 +30
[[end box]]
Pint jar
[[following text enclosed in box]]
Spiral small needles No 7
NO A NO 1 NO 2 NO 3 NO 4
+45 +38 +33 +17 +0
Darning needles +50 +42 +30 +2
[[/end box]]
Jar removed spark from the
machine (number of sparks)
[[following text enclosed in box]]
Spiral small needles No 7
NO A NO 1 NO 2 NO 3 NO 4
+33 +25 +2 -2 -2
Darning needles +45 +45 +22 -2 -0
[[/end box]]
Single spark (from machine)
[[following text enclosed in box]]
Spiral small needles No 7
NO A NO 1 NO 2 NO 3 NO 4
+31 +30 +30 0 0
Darning needles 35 +32 -2 0
[[/end box]]
