189 
(3.) Ho has given about 400 experiments upon the length 
of cotton hairs measured separately by a simple process, which 
he fully described, and exhibited a diagram upon an enlarged 
scale, showing the mean, maximum, and minimum lengths 
of the seventeen qualities of cotton experimented upon. The 
table below is a resume of the experiments, but the author 
furnishes it in this abstract with the caution that, taken 
apart from the detailed measurements as given in the full 
paper, it may give rise to incorrect conclusions. 
NAME. 
Price. Date. 
Longest 
Fibre. 
in. 
Mean 
Length. 
in. 
Shortest 
Fibre. 
in. 
Sea Island Edisto 
,.26d. ...Dec., 1860... 
...2-00 ... 
...1-680 .. 
....1-35 
Sea Island 
,.54d. ...Mar. 1863... 
...1-95 ... 
...1-501 .. 
....1-10 
Queensland Cotton 
1*80 ... 
...1-475 .. 
....1-20 
Sea Island 
. ,16d. ...Dec., 1860... 
...2-03 ... 
...1-444 .. 
....1-10 
Egyptian 
,.9^d. to 9Jd. „ ... 
...1-53 ... 
...1-252 .. 
....0-95 
Egyptian fair 
..22d. ...Mar., 1863;.. 
...1*50 ... 
...1-185 .. 
....0-85 
Maranham 
1*40 ... 
...1-220 .. 
....0-95 
Dencpiella 
1-50 ... 
...1-177 .. 
....0-85 
Pernambuco 
..23d. ...Mar., 1863... 
...1-50 ... 
...1-1675.. 
....0-75 
Maranham 
.. 8-id-... Dec., 1860... 
...1-35 ... 
...1-127 .. 
....0-85 
Mobile 
.. 6|d....Dec., 1860... 
...1-20 ... 
...1-035 .. 
....0-75 
Orleans 
. V-J d.... Dec., 1S60... 
...1*25 ... 
...1-002 .. 
....0-70 
Upland 
.. 6id....Dec., 1860... 
...1-20 ... 
...0-9925.. 
....0-80 
Orleans (good middling) 
..22)-d....Mar., 1863... 
...1-15 ... 
...0-970 .. 
....0-85 
Surat (fair Dhollerab) 
,.17|d....Mar., 1863... 
...115 ... 
...0-9425.. 
....0-75 
Surat (Dhollerab) 
.. 5id....Dcc., I860... 
...1-10 ... 
...0-925 .. 
....0-55 
Surat (middhng Comptah) . . 
.15d. ...Mar., 1863... 
...DOS ... 
...0-905 .. 
....0-70 
(5.) The author has determined the tensile strengths of 
the hairs of the various qualities of cotton by means of the 
apparatus described in the previous abstract, and has given, 
in a series of tables, the breaking weights in grains of every 
hair tested, with remarks upon them.* The following table 
gives the mean and maximum strengths of the hairs ; but, 
like the preceding table, it ought not to be taken apart from 
the detailed tables, where the particulars of the breaking of 
about twenty hairs of each kind of cotton are given : — 
