Solar Observation Log: June 1971 - July 1973. Multi Year Weekly Records Recorded by a Single Observer

Hand-drawn solar 80 page observation log documenting sunspot activity and astronomical data several times per week between June 1971 and July 1973 during the declining phase of Solar Cycle 20. Solar disc drawings to top of each leaf above recorded Universal Times, dates and telescope magnifications. Below are magnified, detailed drawings of specific sunspot groups observed on the sun’s surface alongside solar conditions.

PHYSICAL CONDITION: Small hard back lined notebook in very good condition. 80pp. Observations to verso and recto throughout. Sound, square and clean.