£ s. d.
N o . 5 . Smallex- Student’s Microscope, with quick and slow
motions to body, one eye-piece, sliding tube, stage
the same as N o . 4 , revolving and removeahle diaphragm,
single concave mirror, pliers, forceps, one
glass plate, and mahogany ca se 5 10 0
N o . 6 . Hospital Microscope, without joint, body with rackwork
motion, or sliding tube and slow motion, one
eye-piece, diaphragm, single mirror, and mahogany
c a s e ................................................................................... ; 3 1 0 0
N o . 7- Travelling Microscope, quick and slow motions to
body, two eye-pieces, sliding tube, stage the same
principle as N o . 4 , revolving and removeahle diaphragm,
double mirror, and packed in a mahogany
case 10 inches by 4^ inches and 3-| inches deep ... 7 7 0
N o . 8. Dissecting Achromatic Microscope, with quick motion
and graduated sliding tube to body, stage the
same as N o . 4 , revolving and removeable diaphragm,
single concave miiTor, frd s object-glass,
one eye-piece, erecting glasses and case; power from
5 to 1 0 0 l in e a r 1 ^ 0
N o . 9 . D a rw in ’s Improved Single Microscope, w ith o n e d o u b
le t, th r e e s in g le , a n d th r e e C o d d in g to n le n s e s ,
d is s e c tin g ap p a i-a tu s c om p le te , a n d p a c k e d in a
c a s e .................................................................................................... 1 0 0 0
MICROSCOPE CASES,
F O R N O . 1 IN S T R U M E N T .
Best Upright Case in S p a n is h m a h o g a n y , w ith b o x f o r a p p
a r a t u s .............................................................................................. 3 1 5 0
Best Upright Case, with two boxes ............ 4 1 0 0
Uprig h t Case in H o n d u r a s m a h o g a n y , w ith b o x fo r a p p a r
a tu s .................................................................................................... 2 1 0 0
U p r ig h t C a se , w ith tw o b o x e s ................................................................ 0 3 0
s t r o n g F la t Case in S p a n is h m a h o g a n y , w ith c o v e re d d o v e t
a ils fo r t h e in s tr u m e n t w h e n m a d e p o r t a b l e ......... 2 10 0
N O . 2 .
Best Upright Case in S p a n is h m a h o g a n y , w ith box for a p p a r
a tu s ................................................................................................... 3 3 0
Upright C a se i n H o n d u r a s m a h o g a n y , w ith b o x fo r a p p a r
a tu s .................................................................................................... 2 2 0
Stro n g F la t Case in S p a n is h m a h o g a n y , w ith c o v e re d d o v e ta
ils fo r t h e in s tr u m e n t w h e n m a d e p o i i a b l e 1 15 0
NOS. 3 & 4 .
Best Upright Case in S p a n is h m a h o g a n y , w ith b o x fo r a p p a r
a t u s .................................................................................................... 2 10 0
Upright Case in H o n d u r a s m a h o g a n y , with b o x fo r a p p a r
a tu s ...................................................................... 2 0 0
S tro n g F la t Case in S p a n is h m a h o g a n y , d o v e t a il e d 1 5 0
Achromatic Ohject-Glasses for the Microscope.
Focal
length.
?ower
With
NM
Linear »lagnifying 1
]
nearly
Eye-Pi
N°.2
ieces
N°.3
Angle of
aperture
about
Price.
Lieberkuhn
additional.
1 i inch
Draw-tube closed
Add for each inch
of tube drawn out
20
4
45
6
80
8
13 degrees
£ 8. d.
3 0 0 lb s .
-|- inch
Tube closed ........
Add for each inch
of tu b e.................
60
7
105
12
180
20
27 degrees 3 3 0 11s.
q ^ i n c h
Ditto
Tube closed ........
Add for each inch
of tu b e.................
120
12
do.
210
20
do.
350
35
do.
65 degi-ees
65 degrees
5 5 '0
6 6 0
10s.
Ditto 10s.
l i n c h
Ditto
240
30
do.
450
1
40
do.
Tube closed ........
Add for each inch
of tu b e .................
430
45
do.
720
80
do.
85 degrees
100 degrees
6 6 0
Ditto i 7 7 0
inch
Ditto
Tube closed ........
Add for each incb
of tu b e .............. •
760
60
do.
1
100 degree:
1
120 degree
1300
in
do.
)
s 8 8 C
Ditto )
s,10 10 (
i
* W ith the
I inch object-glass a n d th e e re c tin g g la sse s emplojing eye-pieccs Nos. 1 and 2.
the magnifj-ing power will range from 5 to 150.
APPARATUS
which applies to the cylindrical fitting nnder the stage of
No. 1 or No. 2 M i c r o s c o p e .
£ s . d.
Achromatic Condenser on an improved co n stru ctio n o f two
powers, an d revolving diaphragm, to p ’e v aiious
illumin atin g pencils from 80“ to 25°, also stops for
th e c e n t r a l r a v s , complete with ad ju stm en ts . . . . . . 5 0 U
Achromatic Condenser Without diaphragm, apertui-es 60 and
20°, b rass work with a d ju s tm e n ts 4 ”
Achromatic Condenser, Brasswork of, irith ad ju stmen ts ...^ 1 0 0
■Wenham’s Parabolic Reflector, giving a dai-k field y i th an
object-glass of 100° o f a p e rtu re , with ad justing stop ^ ^
and f it tin g s ......................................... *.................j
Amici’s P rism for oblique lig h t, m o u n ted on an unproved
plan, with th e reflecting surface uncovered to r th e
convenience of wiping ......................................................