<p>
 Cellulose is treated with boric acid to make household insulation.  Here is a picture with plane polarized light.
</p>
<figure class="wp-block-image">
 <img alt="FoldscopeCellulose insulation" class="wp-image-101952 gcloudimg" data-attachment-id="101952" data-comments-opened="1" data-image-meta='{"aperture":"2.2","credit":"","camera":"iPhone SE","caption":"","created_timestamp":"1544396386","copyright":"","focal_length":"4.15","iso":"50","shutter_speed":"0.033333333333333","title":"","orientation":"0"}' data-image-title="FoldscopeCellulose insulation" src="https://storage.googleapis.com/microcosmosdelta.appspot.com/images/transfer_101946/FoldscopeCellulose-insulation-1.jpg"/>
</figure>


Cellulose Insulation

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