Skip to Content
Advanced Search

pp_065

Downloadable Content

Download image

File Details

Depositor
Karen Dykes
Date Uploaded
Date Modified
2021-12-08
Fixity Check
passed on August 08, 2024 at 14:06
Characterization
Height: 1891
Width: 2375
File Format: tiff (Tagged Image File Format)
File Size: 13491864
Filename: pp_065.tif
Last Modified: 2025-05-06T02:52:24.453Z
Original Checksum: 6fc84a7b36eab1215c329cf4b7cb0ad4
Mime Type: image/tiff
Creator Transcript
  • In the afternoon went out to the department at Edinburgh + visited Michael Swann + L.J. Hale. The latter showed me a most interesting closed circulation saltwater system operating 12 - 20 gallon tanks + using an air pump circulating system passing 7 litres per minute. His paper + diagrams are in my library. He also had an ingenious circulating system for the study of growth on hydroids under the microscope it was a system using the siphon principle and is diagrammed on the next page. His time lapse film is taken using a reversing induction motor as the timer with exposures every 20 -70 seconds Hale has found that after a period of life a hydranth may be destroyed. The cells that composed it appear in the coelom + are driven along it by peristaltic contractions to lodge at the next growing point. [Drawing of circulating system for studying the growth of hydroids] To sea water store for refilling Screw clamp To vacuum pump or tap for refilling Siphon tube Perspex cell for specimen Glass tube Hole Very small hole Other end of siphon tube can be raised + lowered to control speed of flow. Sea water store
Permalink
User Activity Date