White cardboard box, lid and base; contains ten glass vials; each a slightly different shade of colour standard Bromthymol Blue; each vial has a paper label near top; with maker name and pH standard; vials separated by cardboard dividers; tissue paper padding to top.
White cardboard box, lid and base; contains ten glass vials; each a slightly different shade of colour standard Bromthymol Blue; each vial has a paper label near top; with maker name and pH standard; vials separated by cardboard dividers; tissue paper padding to top.
Number Of Parts
12
Part Names
a - box base - Size: Length 18.8 cm. x Width 13.7 cm. x Depth 2.0 cm.
b - box lid - Size: Length 18.8 cm. x Width 13.7 cm. x Depth 2.0 cm.
c - vial: Bromthymol Blue pH 6.0 - Size: Length 12.0 cm. x Depth 0.5 cm. x Diameter1.6 cm.
d - vial: Bromthymol Blue pH 6.2 - Size: Length 12.0 cm. x Depth 0.5 cm. x Diameter1.6 cm.
e - vial: Bromthymol Blue pH 6.4 - Size: Length 12.0 cm. x Depth 0.5 cm. x Diameter1.6 cm.
f - vial: Bromthymol Blue pH 6.6 - Size: Length 12.0 cm. x Depth 0.5 cm. x Diameter1.6 cm.
g - vial: Bromthymol Blue pH 6.8 - Size: Length 12.0 cm. x Depth 0.5 cm. x Diameter1.6 cm.
h - vial: Bromthymol Blue pH 7.0 - Size: Length 12.0 cm. x Depth 0.5 cm. x Diameter1.6 cm.
i - vial: Bromthymol Blue pH 7.2 - Size: Length 12.0 cm. x Depth 0.5 cm. x Diameter1.6 cm.
j - vial: Bromthymol Blue pH 7.4 - Size: Length 12.0 cm. x Depth 0.5 cm. x Diameter1.6 cm.
k - vial: Bromthymol Blue pH 7.6 - Size: Length 12.0 cm. x Depth 0.5 cm. x Diameter1.6 cm.
l - vial: distilled water - Size: Length 12.0 cm. x Depth 0.5 cm. x Diameter1.6 cm.
Provenance
Colorimeter standards used for comparing pH of colours
Label to box lid: LaMotte // Standards / Bromthymol Blue / One Set // pH 6.0-7.6; labels to vials: Bromthymol // Blue // pH // Made By // LaMotte Chemical // Chestertown, Maryland, USA
Permanent Location
Storage Room 0010
0010-F7-2
Condition Remarks
overall condition good; labels yellowing
Copy Type
Original
Reference Types
Person
Book
Reference Comments
Dr. Wally Breck; Dr. Robert C. Wheeler; item cited in "Scientific Instruments, Laboratory Apparatus and Equipment," Central Scientific Company of Canada, Toronto, 1942, p. 435, item 21550H