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New s1and magni–

fier permi1s detailed

observations of the

crystalline structure

of rock, mineral and

fossil specimens

Study the structure of crystals

. .

!.earn to identify earth's el.ements

Lionel-Porter MINERALOGY

$988

Analyze the content of rocks by using real test chem–

icals. Plastic stand magnifier has wide-range focusing

arm .. ideal for indoor or "field trip" use. This big set

contains 30 rock and mineral specimens

in

plastic

compartments for easy removal, non-spill alcohol lamp

with blowtorch, chemicals, streak plate, test tubes

and charcoal block. 144-page illustrated manual. Stand–

up 3-panel metal cabinet, 29x13 in. open.

49 N 2101-Shipping weight 9 pounds ........... .$9.88

iiliiitiiiiii

Figure math probl.ems on real-working

ancient abacus or modern slide rul.e

Lionel-Porter MATHCRAFT

$588

All

the equipment to make math actually fun •. helps

you solve problems fast. Excellent manual provides

short cuts, arithmetic problems. Set contains abacus,

slide rule, protractor, compass, ruler, draftsman's pen–

cils,

two angles, modeling compound and tangrams to

make geometric designs, spheres, pyramids, etc.

79 N 2132C-Shipping weight 3 pounds...........$5.88

Chemcraft Accessories

$744

without

battery

Add to your set a chemical agitator

(order 1 "C" battery, facing page),

crime detection kit, centrifuge, hy–

drometer, scale, wash bottle, chemical

rocket, secret-writing pen.

79 N 2241 C-Shipping wt. 3 lbs•.

.

$7.44

Study specimens

make slides

. .

learn lab techniques

Lionel-Porter Biocraft Kit

includes detailed manual

Youngsters can learn elementary biology in classroom-like man–

ner

as

they

dissect

frog,

fish, crayfish and starfish. Includes

scalpel, surgical scissors, forceps, spatula,

2

dissecting needles,

metal microscope at right. Also shrimp hatchery, slide prepara–

tion kit, glass

rod,

methylene blue stain, rack, plant seeds,

diatomaceous earth, feather, manual. Stand-up metal cabinet,

31~x12

in.

open.

Light source

UL

listed. 110-120-v., 60-c. AC.

49

N 2099-Shipping weight 10 pounds.......•.........$15.66

Even this low-priced

Biocraft

Set

has 3-lens microscope

$988

without

battery

Battery-illuminated micro–

scope bas 60, 180, 425-power

lenses. Has frog, crayfish,

clam, scalpel, forceps, dissect–

ing needles. Dried bugs, flies,

shrimp eggs, stain, dropper,

diatomaceous earth, manual.

Order

1

"C" battery below.

Metal cabinet, 21x13 in. open.

49 N2098-Wt.5lbs.8oz.$9.88

"C" Battery. Wt. ea. 2

oz.

49 N 4665-Ea. .. 16c;

4

for

60c

Biocraft Accessories

$495

Add to your microscope set dissecting

instruments plus 4 animal specimens:

frog, crayfish, worm, fish. Also shrimp

eggs ready for hatching, plant seeds,

microtome for sectioning, manual.

49 N 6364-Shpg. wt. 1 lb. 8 oz. . $4.95

Precision Microscope

in

thill set bas 3-nose turret

with

75,

180 and 450-pow–

er lenses. Power

pod

ro–

tates 360° for viewing

from any sjde of micro–

scope. Aperture control.

Gear focus adjustment.