THE SC IENTIST. 
109 
FORMERLY THE NATURALIST. 
Entered at Kansas City, Mo., for trans- 
mission through the mails at second class 
rates. 
Kansas City, July, 1891. 
A aionthly Journal, devoted to 
all branches of 
soie:itce]_ 
The Aciideiiiy of Science Pub. Co., 
Publishers and Proprietors, 
Kansas City, - - Missouri. 
n. B. Troiislot, Editor. 
Associates: J )seph Sharp, M. D., E. Butts, 
Uavid 11. Todd and Sid. J. Hare. 
CO ^flS 3PDN 3E *CE AND ITEMS UPON SUBJECTS OF IN 
TEHEST TO SCIENTISTS SOLICITED FROM ALL. 
RBASONABLE. 
• 1 
WHEN WRITING FOR INFORMATION, IF YOU WISH TO 
MA IE CERTAIN OF A REPLY. PLEASE ENCLOSE STAMP. 
OFFICIAL ORGAN OF THE 
flcadEniii nf SEiencES. 
OFFICERS FOR 1891. 
f]. liUTTS Pesident. 
W. H. YEATON Vice President. 
11. B. TROUSLOT, Recording Pec. 
DAVID IT. TODD Corresponding Sec. 
KDWARD T. KEIM, ... Treasurer 
FREDERICK McINTOSH Librarian. 
S £ D. J . H A R E .... , Cu lator. 
EDWIN WALTERS Chairman, Ex. Com. 
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And direct all Communications & Articles 
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Ed. Scientist, Kansas City. Mo. 
No doubt some ol the readeis of 
Scientist were intertsted in a recent article 
appearing in its columns by Roger Cunning 
ham, entitled "Drawing for Photo-repro- 
duction," which describes the simplest 
means of preparing good illustrations; so sim- 
ple that those having no previous experiei ce 
can make their own cuts, if they can draw at 
all. The plate in this issue illustrates this 
simple method. It is Prof. Rowley's first 
attempt at this kind of work. 
To those who cannot draw, you, too, can 
prepare cuts, by photographing your speci- 
mens or objects twice the natural size, with 
an enlarging camera. Prepare Ross' stipple 
paper No. Ij as you would for ordinary blue 
print work, then print from your negative on 
the prepared paper, and thus secure an exact 
drawing of your object. With a Dickson's 
pencil No. V. S. or S., blacken the blue print 
just as shaded in blue. As blue is not repro- 
duced in making the plates it is necess- 
ary to see that all the blue print is covered. 
The object in making the drawing twice the 
actual diameter is to give a better chance to 
illustrate details in small objects. When the 
object is large as a house, use No. \^ papsr 
as for all other drawings, making the draw- 
ing twice the dimensions of the desired cut. 
In etching, it is reduced one-half the size of 
the drawing, thus making the cut of the de- 
sired size. 
Should any of our readers desire to try 
this work, and will make their wishes known 
to us, we will give a full desciiption of 
the process of making theblue print liquid, 
preparing the paper, etc., in another issue. 
S. J. H. 
Prof. G. C. Broadhead of the State Uni- 
versity spent a day in Kansas City recently 
looking over the several collections, his 
special object being to secure some speci- 
mens of the newly discovered Crinoids and 
Foot-prints with which the readers of 
J^CIENTIST are familliar. 
