Sodium perborate is a white, granular solid which decomposes in an aqueous solution to hydrogen peroxide and sodium borate. Active oxygen content 10%. Melting point is 63 degrees Celsius. It's used in

 

Bid is for lettering kit in case9 additional templatesBag full of K&E lettering pens various sizesTemplates in box 3240 - (2) 80CL, 100C, 120 CL, 140, CL, 175Cl, 200CL, 240CL,290CL, 425Cl, 500CL,

 

Vintage Pickett & Eckel Trig Slide Rule Model N1010-ES 12" Excellent condition. Copyright 1959. Comes in its original Picket case. Thanks for Looking!!!

 

ANTIQUE MICROSCOPE SLIDE BED BUG DESCRIPTION:- ANTIQUE MICROSCOPE SLIDE BED BUG SIZE APPROX :- 3 X 1 INCHES 7.5 X 2.5 CM. CONDITION :- SEE PHOTOS. Condition: Fine ITEM CONDITION DESCRIBED ABOVE PLEASE

 

Vintage R.H. Burton Optical Trial Lens Kit with Trial Frame in dove tailed wood box including 2 keys. Measures 21.5" x 13.75" x 2.5". Trial frame is marked R&B Japan. The box has a plate on the fr

 

These 5 slides are all thin sections of rock and best viewed under polarised light. The most striking image is the only slide without any information ,but looks to be a form of granite. The next is Fe

 

VINTAGE MINIATURE FOLDING BRASS COMPASS WITH MAGNIFYING GLASS DIMENSIONS: FOLDED = 1-3/8" x 7/8" OPEN = 2-5/16" COMPASS WORKS! COMPASS GLASS AND MAGNIFYING GLASS ARE CLEAR. SAYS: "ENGLAND" ON THE BACK

 

THIS IS A HANDSOME MEDAL ISSUED TO ATTENDEES AT A MICROBIOLOGY CONFERENCE IN 1939.IN VERY FINE+ CONDITION WITH MILD TARNISH AND MILD WEAR FROM HANDLING AND AGE. AS SHOWN.MEASURES 2"SQTHANKS AND GOOD L

 

I'M SELLING THESE FOR SOMEONE ELSE AND I KNOW NOTHING ABOUT THEM. WHAT YOU SEE IN THE PICTURES IS WHAT YOU GET. THERE ARE 7 DIFFERENT COINS FROM 5 DIFFERENT OLD MINES IN KENTUCKY AND TENNESSEE. BLOCK

 

Nice Taylor Baroguide barometer, temp, and Humidty art deco box. No cracks, but front plastic is kinda loose. Nise patina to face, very old I guess. Any questions ask.....Alan