Nice color blindness book with nice illustrations for testing and demonstrating color blindness. Both numbers and figures appear in the book.
Text in both Chinese and English.
This rack filters 0%, 25%, 50%, 75% and 100% of incident light to simplify the study of primary productivity.
Model, measure and understand complex density driven circulation associated with heat transfer through convection.
Designed to be placed in air or water flow. When connected to the General Flow Sensor, aids in measuring pressure differences.
Allows students to explore the rate of water movement and quantify pressure changes occurring in the system.
Vials contain a vacuum-sealed color forming reagent to test a variety of water quality parameters. 30 individual Total Hardness test vials.
