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First Class Microscope Stands—Nos. 1 & 2. T h e se S ta n d s are c o n triv ed fo r a n easy a n d m o s t a c cu ra te m o d e o f aUDlviuv every k in d o f illum in a tio n ; o n e o f similar c o n s tru c tio n was sh own h y S. an d B. a t th e G re a t E x h ib itio n o f 1851, an d is th u s m en tio n e d by th e J u ry . “ T h e S ta n d is ex c ellen t in p r in c ip le ; th e b o d y , stag e , an d appliances b e n e a th , are all ca rried o n one s to u t b a r. o n th e recom m en d a tio n ot M r. G. Ja ck so n , b y m ean s o f which th e c e n trin g o f th e Achroma tic illum in a tio n is ren d e re d easy a n d c e r ta in ; a n d o n an y trem o r b e in g com m u n ica ted to th e In s trom e n t, it is eq u ally d is trib u te d over th e whole o f th e wo rk in g p a rts .” . , r-tro n . (R ep o rts o f th e Ju rie s , p . 2 6 6 , Class X . N o . 253.) N o . 1. Im p ro v e d L a rg e Mic roscope. T h e lim b c o n tin u e d £ s. d. u n d e r th e s ta g e ,a n dw ith cylindrical f ittin g an d rack - w o rk , fo r ap p ly in g all illum in a tin g a p p a ra tu s with ease an d accm’a c y ; m o u n te d o n two p illa rs an d cones, with rev o lv in g ba se to t r i p o d ; b o d y with q u ick a n d slow m o tio n s, g r ad u a te d s lid in g tu b e, a n d two eye-pieces ; stag e a b o u t h a lf an in ch th ic k , w'ith v e rtic a l an d h o riz o n ta l actio n s (given h y ra ck - wo rk a n d screw, o r lever), slid in g a n d revolving p lan e s, a n d sp rin g c lam p in g p ie c e ; d iap h ragm with rev o lv in g an d rem oveable f ittin g s ; la rg e p lan e an d concave m irro rs, wdth le n g th e n in g a rm , an d sliding on a tria n g u la r b a r ; p lie rs, jo in t an d fo rc ep s, an d tw’o glass p late s ^ ^ B e s t U p r ig h t Case in S p an ish m ah o g an y , w ith two boxes fo r api^ ara tus o } c n B e s t U p rig h t Case w ith o n e b o x ....................................... 3 15 U U p ri‘^ht Case in H o n d u r a s with two boxes ................ 3 3 0 ^ do. do . one b o x 2 10 0 N o . 1. Im p ro v e d La rg e Mic roscope, th e same as th e above, h u t m ad e very p o rta b le ...................................................... ^ S tro n g S p a n ish M ah o g an y C ase fo r d itto , with covered dovetails (19 in. lo n g by 9 in. wide, an d 4 m . deep) 3 10 0 N o . 2. Im p ro v e d Sm aller Microscope, o n th e same p rin cip le, an d with th e same a c tio n s as N o . 1, b u t with single p illa r ^ ^ B e s t U p r ig h t Case in Sp an ish m ah o g an y , with box for a p p a ra tu s ......................................... ; ^ ^ do. H o n d u r a s do. do. ... 2 10 0 S tro n g F la t do. in S p an ish , a n d covered d o vetails ... 1 15 0 First Class Microscope Stands.—Nos. 1 & 2. APPARATUS. 3 rd E y e -p ie c e fo r No. 1 S ta n d ............................................ do. do. N o . 2 do ............................................ In d ic a to r to N o . 1 E y e -p ie c e ........................................ do. N o . 2 do. ............................................ do . N o . 3 do. ...................................... A c h rom a tic Condenser on a n imp ro v ed co n s tru c tio n o f two powers, an d revolving d iap h ra gm , to give v a rio u s illum in a tin g pen c ils, from 80° to 25°, also s to p s for th e c e n tra l rays, com p le te with a d ju s tm e n ts .............. A ch rom a tic Condenser d iap h ra gm , a p e rtu re s 60° an d 20°, b ras s work with a d ju s tm e n t s ............................. A c h rom a tic Condenser, b ras sw o rk of, w ith a d ju s tm e n ts ......... R ig h t A n g le P r ism fo r re flec tin g th e lig h t m o re pe rfe c tly th a n th e m irro r, with a d ju s tm e n ts a n d fittin g s to th e tria n g u la r m irro r s tem com p le te , a n d th e reflec tin g surface u n co v e red fo r th e convenience o f w ip in g ......... Am icV s P r ism fo r o b liq u e lig h t, m o u n te d o n a n improved p lan , an d th e reflec tin g sm-face u n c o v e re d .......... . N a c ^ c i’iP m m f o r o b l iq u e lig h t, with a c cu ra te revolving fittin g Wenham’s P a ra b o lic Reflector, g iving a d a rk -fie ld w ith an O b je c t-G la s s o f 100° of a p e rtu re , a d ju s tin g s to p a n d fittin g s P o la r iz in g A p p a r a tu s o f tw o N ico l’s P rism s , with revolving D a r k e r ’s Series o f S e len ite s, which give 13 differen t colours a u d th e ir com p lem e n ta ry tin ts , m o u n te d on a n im p ro v ed p lan fo r theii* m o re a c cu ra te a n d easy appliance Se len ite F ilm o f two c o lo u rs ................................................................. B la c k Glass P o la r ize r , with f ittin g .................................. .............. Two Dou b le Ima g e P r ism s an d Se len ite film, with fittin g s to E y e -p ie c e , a n d b ras s p la te w ith h o le s ............................. zls to show r in g s ro u n d th e o p tic ax is an d fitte d to E y e -p ie c e ...................................................................... «^ach from To u rma lin es ...................................................................................... L a r g e B u ll’s E y e C o n d en s in g L e n s o n s ta n d ............ Sm a ller Condensing L e n s , with b a ll-an d -so c k e t jo in t to limb S id e S ilv e r R e fle c to r, with com p le te fittin g s to limb .............. D a r k W ells o f th re e sizes, w ith h o ld e r ............................................ B ro o ke’s double K ose-piece ................................................................. Camera L u c id a , W o lla s to n ’s ................................................................. Micrometer, w ith J a c k s o n ’s a d ju s tin g screw an d f ittin g s to E y e -p ie c e .................................................................................. ........ M ic rom e ter for s ta g e , d ivided in to I OOths an d 1 OOOths o f an in ch Compressorium ........................................................................................... do. W e u h am ’s, fo r u se with P a r a b o la ........................ S c rew L iv e B o x ........................................................................................... L a r g e L iv e B o x ........................................................................................... Synaller d o ................................................................................................. La i'g e Glass T ro u g h , w ith wedge an d sp rin g com p le te ......... Fro g P la te , with b ag , &c., com p le te ............................................. Glass Tubes, se t o f th re e ...................................................................... Three-pronged Foi'ceps ........................................................................... £ s. d. .. 0 17 6 0 15 0 0 5 0 0 5 0 .. 0 5 0 5 0 0 2 10 0 1 0 0 2 10 0 2 2 0 1 1 0 1 15 0 2 5 0 3 15 0 5 0 0 0 15 0 2 2 0 0 10 6 1 0 0 1 1 0 0 18 0 1 1 0 12 6 1 10 0 1 0 0 1 0 0 0 10 0 1 0 0 0 7 6 0 14 6 0 8 6 0 6 6 0 8 6 0 10 6 0 2 0 8