10" Sweeping Net for Vegetation and Insects with 36" Handle Glass Sets & Apparatus_Extraction Apparatus calculating relative humidity from the

calculating relative humidity from the temperature difference between the two readings for meteorology coursework

accepting solar-cell input or battery power for energy-conversion student demonstrations

and pins outfit groups for hands-on study of pinhole imaging

8 inches diameter by 4 inches tall for gas collection over water

Three-inch inner diameter supports beakers and funnels on this plated mild steel closed retort ring

10" Sweeping Net for Vegetation and Insects with 36" Handle Glass Sets & Apparatus_Extraction Apparatus calculating relative humidity from theRugged sweeping net with a 10 inch ring and long handle drags through vegetation, dislodging insects from grass and shrubs for meadow collection work.