Mineral Point tribune. (Mineral Point, Wis.) 1869-1938, 1891-01-10
Three Scientists Who Have Devoted
Their Genius 10 the Study If
the Physics.
TIE Original Work an Color Was
Made By Professor Rood Of
Columbia.
The Physical laboratory Of Johns
Hopkins University and Its
Studies in Micrometry.

slcs their speciality. and ia thu present ~
Per = return % q group Of men wh,
have made that subject tine work Of then
lives
The first 70 whom w desire 10 caIl al
/. tenti0n j. Ogden Nicholas Rood wa0 wa,
born 10 Uanbury Conn. In Fe5ruLrv
( 1881, and Is TIE son 81 the Rev Ans5r
Rood, long known as an eminent preacher
In Philadelphia. He vas graduated IN
I Princeton ln 1852 ana there developed d
I f0uduess for science. ia consequence ui
which he pursued studies first at thu
4 scientific se6ool Of Yale. and then in
/ EarOpe at the Universities Of Munich anj
Berlin
tie returned % tue United States in
/ 1855 and almost at once was called 10 the
char Of chemistry and physics at Troy uni
yer,lty. Soon after the beginning Of the
civil war the chair Of physics at Columbia
/ college became vacant ia consequence OF
! the expulsion Of Professor Richard S. Nc
+ tQlloh. who. a sOutheruer by birth. had
( FASTENED 10 the aid Of his c0untrymen.
To TIM, vacancy Professor Rood was chosen
IN 1863, and has Since retained that chair.
and also delivers the lectures az the Col
umbia College School Of Mines
T During his administration the department
I has grown until 1t now fills with its large
collection Of apparatus the top floor Of
Hamilton ball
4 Professor Rood was one IF the first toapp-
( ly photography 10 the microscope and to take
/ picture, with that instrument Sub.e-
F gueuHY be studied The nature Of the cleo
/ trlC sparE, aud in measuring the duration
l 81 flashes. be was obliged 70 make more
minute determinations IT time than had
/ previously been measured Afsry William
( CrOOkers magnificent researches on radi o.
Z ant matter Professor kold repeated hi.
work and In That connection in l-s5 he
1 devised Z merturIai air pump giving an
expansion 81 l-3.s milIonth Of atmos-
pierre q degree tbat has not been attained
by other pumps up % the present time.
u mas likewise shown considerable i'm
genulty ia introducing new methods of
/ ph0t5nairy and he has studied very ex-
tenssvely such phenomena az depend on
{ the physiology Of vision. Prof Rood was
Z the first GO make cumulative experiments
1 ou color contrast In l-Sl he published
iu the international Scientific Serle. his
work ou Modern Cnr1matlcs, which
contains thu results Of numerous original
I ingastIgs and gives the fundamental
/ facts connected with our perception OF
ca|ar.
/ Professor Rood paints in water eolors
and frequently exhibits q the animal coli
lecuons If tGe American Water Color So.
cipty. IS which be- has been member
since 1866 He has long been a member
OF the American association for the all.
yaucemeut If scsguce. and in 81 was one
( of its yIce-Ure dents As an authority on
physics he stands deservelly high. and I'M
lst5 he was chosen member Of the Ma
houal Academy of ianees
Likewise Ghe SON of cIergyuen Is Henry
Augustus Rowland. who was born ln No
yemher. Is4s, at Houetlaie Pa where
ii, father was the Pros ytrrlan minister.
Ine Young man was educated NJ the Rens-
stiueT Polytechnic Institute where h. was
graduated as q civil engineer ia 1850.
Subsequently be spent some time in sur
yayiug on a railroad and also taught 40
Webster university, In ohio, but IN 1872
returned 20 Troy as instructor IL physics
at the Institute, and ln lisa was ADVANCED
% assistant professorsaip lie then spent
a year abroad visiting various laboratories,
and spent most 0f his time at the uuiyers-
its ST Berlin under the great Heimlaltz.
When the Johns Hopkins university came
into active operation iu 1876. Professor
Rowland was called % the head oi the de-
partmeut OF physics there, which place be
still haIas He has charge % the physlca.
lahoratury. where leua laer81 Bile original roe
search IS being carried on under his sup
ery.sion. and where some of lls own mast
brilliant Investigations have been conduct
3d.
While In Berlin he showed experiment
at.r that "A MOVING charge lf ~fHf1nat p.aN-