Dactylography; Or, The Study of Finger-printsFaulds, Henry
History
Dactylography; Or, The Study of Finger-prints
Faulds, Henry
Fingerprints
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NAME | =REMARKS.=
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Year of Birth Complexion |
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Hair Eyes |
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Height ft. in. |
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L { |
a { *Sentenced at |
s {---------------------------------------------|
t { |
{ " on |
C {---------------------------------------------|
o { |
n { " to |
v {---------------------------------------------|
i { |
c { " *for |
t {---------------------------------------------|
i { |
o {* Give offence in full, and if remanded only,|
n {substitute “Remanded” for “Sentenced.” |
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It may be necessary to test the concurrence of curved lines in two
exhibits similarly enlarged. At one time I used strips of plumber’s
lead, placed edgeways on the curved lines to be compared. They could
be flexed so as to show the various sinuosities, however complex,
but leaden tapes cannot readily be made to retain the form imparted
to them. Copper wire I found to be stiffer, but it readily warps off
the plane. An excellent way is to draw on transparent paper a line
corresponding to the curved line seen underneath. The transparency is
then transferred and adjusted to the other enlargement, the curves of
which should be seen to be congruent. The instrument called “flexible
curves” which is used by engineers and mechanical draughtsmen I at last
tried, and found it to be exceedingly serviceable for such comparisons.
The pattern “=B=,” self-clamping, 12-inch size, is for most cases the
most suitable. Other patterns are made also, in sizes of 9 and 18
inches. The “=B=” pattern has a flexible steel strip, like the lead
tape just mentioned. After the curve or series of sinuosities has
been adjusted correctly, the shape is rigidly retained by means of
a stiff-hinged link-work arrangement attached by tabs. The strip of
steel should not be pressed down between two tabs, and when bending
or straightening out the instrument one should do so bit by bit,
beginning at one end and continuing onwards from there. This useful
self-clamping instrument used to be supplied by Mr. Wm. Brooks,
Public-domain text, read in full here on John Shaqi.
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