Daniel Israel

Photo of pond scum taking at 8:42pm on 4/8/19 in Broad. Obtained by using the sample given in recitation. Image shows several organisms shaped like dots. They are dispersed fairly evenly across the sample. The domain is Bacteria.


 #caltechbi1

<figure class="wp-block-image">
 <img alt="MVIMG_20190408_203945" class="wp-image-141058 gcloudimg" data-attachment-id="141058" data-comments-opened="1" data-image-meta='{"aperture":"1.8","credit":"","camera":"Pixel 2 XL","caption":"","created_timestamp":"1554755985","copyright":"","focal_length":"4.459","iso":"96","shutter_speed":"0.002265","title":"","orientation":"1"}' data-image-title="MVIMG_20190408_203945" src="https://storage.googleapis.com/microcosmosdelta.appspot.com/images/transfer_141034/MVIMG_20190408_203945.jpg"/>
</figure>

Pond Scum

The pollen was taken from the Hibiscus flowers outside Page House at 5:18pm, 5/10/19. The sample was taken by gently scraping the inside of the flower.

<figure class="wp-block-image">
 <img alt="MVIMG_20190510_171429" class="wp-image-149300 gcloudimg" data-attachment-id="149300" data-comments-opened="1" data-image-meta='{"aperture":"1.8","credit":"","camera":"Pixel 2 XL","caption":"","created_timestamp":"1557508469","copyright":"","focal_length":"4.459","iso":"108","shutter_speed":"0.008335","title":"","orientation":"1"}' data-image-title="MVIMG_20190510_171429" src="https://storage.googleapis.com/microcosmosdelta.appspot.com/images/transfer_149298/MVIMG_20190510_171429.jpg"/>
</figure>
<figure class="wp-block-image">
 <img alt="60354049_1065349686990981_8773487458277916672_n" class="wp-image-149299 gcloudimg" data-attachment-id="149299" data-comments-opened="1" data-image-meta='{"aperture":"0","credit":"","camera":"","caption":"","created_timestamp":"0","copyright":"","focal_length":"0","iso":"0","shutter_speed":"0","title":"","orientation":"0"}' data-image-title="60354049_1065349686990981_8773487458277916672_n" src="https://storage.googleapis.com/microcosmosdelta.appspot.com/images/transfer_149298/60354049_1065349686990981_8773487458277916672_n.jpg"/>
 <figcaption>
 The pollen is yellow, with an uneven almost spiky texture.
 </figcaption>
</figure>

 The pollen is from a Hibiscus flower. Judging by the color, more specifically it is Hibiscus brackenridgei. Although the picture does not show the diameter of the lens, approximately 10 grains of pollen could fill the field of view of the 1mm diameter lens, so the pollen is about 0.1mm wide.


 #caltechbi1

Daniel Israel

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Pond Scum

Pollen of Hibiscus Flowers at Caltech

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Foldscope Lens Magnification