Notebook kept by Ernest Lenaerts during his work on the LEO computer, dated 1st February to 26th May 1952.

View the transcription for this notebook (opens as a separate document).

Includes entries:
NB09-002: 1st Feb 1952
NB09-004: [maintenance schedule]
NB09-005: 5th Feb 1952  [Progress meeting]
NB09-009: [test recordings]
NB09-010: 12th Feb 1952
NB09-011: 14th Feb 1952
NB09-013: Collation
NB09-015: Reliability Trials. Reconverter.
NB09-016: 15th, 18th and 19th Feb 1952
NB09-018: ['This evening I hope to prove her wrong. […]  Failed']
NB09-020: 21 Feb 1952
NB09-021: Switching on Converter
NB09-024: 27th Feb 1952
NB09-025: 28th Feb 1952
NB09-027: [Diagrams/doodles page]
NB09-028: 29th Feb 1952
NB09-029: [Selenium Rectifier measurements, not in Lenaerts' hand]
NB09-030: [other measurements, not in Lenaerts' hand]
NB09-033: 5th Mar 1952
NB09-034: [diagram with face drawn in later in pink, by child?]
NB09-035: Collater. Report for meeting with SCT
NB09-037: [Diagrams/doodles page]
NB09-039: 10th Mar 1952
NB09-042: 14th Mar 1952
NB09-044: Late Duty Officer [rota with initials]
NB09-045: 17th Mar 1952
NB09-046: 18th Mar 1952 [paper reservoir/paper feed diagram]
NB09-047: [Diagrams/doodles page]
NB09-049: 24th Mar 1952
NB09-050: 25th Mar 1952
NB09-051: 26th Mar 1952
NB09-054: 28th Mar 1952
NB09-055: 31st Mar 1952
NB09-057: 1st Apr 1952
NB09-059: 3rd Apr 1952
NB09-062: 4th Apr 1952
NB09-063: Lessons to be learned from past weeks work
NB09-065: 8th Apr 1952
NB09-068: 15th Apr 1952
NB09-072: 16th Apr 1952
NB09-074: 23rd Apr 1952
NB09-076: 30th Apr-1st May 1952
NB09-077: 2nd May 1952
NB09-080: 4th May 1952
NB09-081: [list of pairs of LEO team members working on different aspects of the second LEO - what would be LEO II - with Lenaerts listed with Leo Fantl as 'computer']
NB09-082: 7th May 1952. 'Yesterday saw the inauguration of the special committee considering the building of the second Leo.'
NB09-086: [Diagrams/doodles page]
NB09-087: 13th May 1952
NB09-091: 15th May 1952. 26th May 1952.

The Lenaerts notebooks are being digitised and transcribed as part of the National Lottery Heritage Funded LEO project at The Centre for Computing History.  We are indebted to our team of volunteers for scanning and transcribing the notebooks. If you would like to get involved with our work on these fascinating documents, please get in touch!

Provenance :
The notebooks are being digitised while on loan to The Centre for Computing History from the LEO Computers Society, with the kind permission of the Lenaerts family.