T H E J O U R N A I , OF I N D U S T R I A L A N D E N G I N E E R I N G C H E M I S T R Y
June, 1916
lowing formulae for obtaining contents, etc., of a n Ungula of Right, Regular Cylinder will be found useful. V = Volume S = Lateral or Convex Surface = Radius bf Cylinder; h = Length of Cylinder = Area of Seameat, a b a: B = Length of arc, a b a A1 = Area of Segment, c d c; Bl = Length of Arc, c d c CASE 1, where Base = Circle CASE2, where Base = Segment, a b u Y
A
V
=
'2
v
xv?h
CASE3, where Base = Half Circle 3
(? p 4-,A) 12 3 Y + 8
h r S g CASE4, where Base = Segment, c d c h V = $ 3 - wA1) 3 r--w h S ( 2 u P - wB1) __
S = (2rf f gB) __
S = arh V =
=
y2h
S = 2rh
(z
E
Y
-
-
and starts t h e suction column. The liquor t o be filtered is poured in on t h e mat before t h e column is broken a n d a n y accumulated air removed from time t o time through E . As t h e filter still contains nearly its own volume of water the liquor is allowed t o flow into t h e water receptacle until t h e filtrate begins t o appear in the narrow tube, as shown by a change in color or refraction, then a new receptacle substituted. N o
l---l A
- v.J
CASE5 , Frustum, h - h1, of Ungula of Right, Regular Cylinder Let V = Volume of imaginary cylinder of length h, V' = Volume of imaginary cylinder of length h' V ' = Volume of Frustum, of length h h' Then V" = V V' THE IKSTITUTE OF INDUSTRIAL RESEARCH,WASHINGTON
A RAPID FnTER FOR TURBID LIQUIDS By RALPHC. SHUEY Received January 17, 1916
The simple apparatus here described contains no new elements b u t since it has proven far superior t o other filters for turbid liquids of high viscosity, i t may be of interest. The paper pulp used by distillers is probably t h e most satisfactory filter mass for such purposes, b u t in a Buchner t h e mat cannot be built deep enough t o run any length of time without clogging, and when clogging commences t h e suction packs t h e mat so t h a t i t blocks almost immediately. The filter pulp is thoroughly macerated with hot water and poured into t h e funnel (Fig. I) a little at a time, packing down after t h e formation of each half inch of mat. For very muddy liquids the upper surface is b u t slightly packed. The water drained from the pulp sweeps practically all t h e air from t h e tube D
523
--B
A-5-pint
bottle with the bottom cut off
B-Plate of perforated metal or porcelain, preferably gasketed with a rubber band
b
C-Distilling
D-Tube
flask neck
of rubber or glass about 30 in long
E-Pinch-cock
for removing air from the suction
further attention is required except t o keep the funnel filled a n d if there are any leaks, t o remove t h e air through E occasionally. With a Bunsen pump the suction is irregular and also tends t o build up until the filter blocks or 'breaks through. The efficient working of this arrangement is attributed t o t h e slight b u t uniform suction obtained. Neither does the filter suck through when empty. ARMOURGLUE WORKS,CHICAGO
THE DEDICATION OF THE NEW CHEMISTRY BUILDING UNIVERSITY OF ILLINOIS The new Chemistry Building of the University of Illinois was formally dedicated on t h e 19th of April. The exercises were held in t h e Auditorium and the program was as follows:
due amount of its funds upon t h e mere piling up of brick and stone. The well-worn statement t h a t a satisfactory college is a log with a man at one end a n d a boy a t the other was t h e beginning, perhaps, HONORABLE EDWARD F. DWXXE.GOVERNOR OF ILLINOIS,Presiding of t h e serious criticisms made upon many of our AmerSCRIPTURE READING A N D PRAYER. REV. GEORGE P. HOSTER, D.D., Rector ican institutions t h a t they were in the habit of spending of Emmanuel Episcopal Church, Champaign MUSIC.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . "Illinois" too much money on brick and mortar, and too little ADDRESS, . . . . . . . . . . . . . . . . . . . . . . . . . . . .PRESIDENT EDMUND J A N ~JAMES S on flesh and blood. You will remember t h a t Johns ADDRESS, "THE TRAIKING OF CHEMISTS ALEXANDER SMITH.Professor of Chemistry, Columbia University Hopkins University started its beneficent a n d epochADDRESS, "RESEARCH A S A NATIONAL DUTY " WILLIS RODNEY WHITNEY, making work in t h e field of American education in Member of the U S. Naval Bdard, Director of the Research Laboratory of the General Electric Company a very inferior and in some respects, for its purposes, h.fusrc . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . America" The addresses by President James, Professor Smith, poorly adapted set of buildings, and t h a t i t has been and Dr. Whitney are printed in full below, a n d are pointed out many times as an illustration of how to followed by a n illustrated description of t h e building, do things worth while in t h e field of university educaprepared especially for us by Dr. B. S. Hopkins of t h e tion, as compared with some other institutions in t h e Chemistry Department of t h e University.- [EDITOR.] country which spend large sums of money upon t h e erection of great buildings a n d have comparatively little left for equipment, running expenses, and the INTRODUCTORY ADDRESS BY PRISSIOEKT EDMUND JANES JAMES payment of the salaries of the university professors, The dedication of a great and expensive building, There is undoubtedly a great deal of t r u t h in the erected for university purposes, always raises t h e general view t h a t we Americans run t o large accumuquestion whether a university is not spending a n un- lations of brick and stone, instead of accumulations "
