A water sample was taken from the Caltech turtle pond on 4/8/19 around 7:15 PM. The sample was obtained using a pipette to transfer the water from the pond to a glass slide. After a coverslip was taped over the sample on the glass slide this image was taken with a foldscope. In this image we see the edge of an air bubble as well as a small organism. The magnification of the foldscope is 140x and the magnification of the phone camera used is about 37x. Therefore, the total magnification of this image is 5180x. Since the organism is 0.4 cm in length in the image, we can estimate that it’s actual size is about 80 micrometers.

#caltechbi1