Contents 2
Two worlds to explore 2
The first telescopes 4
Galileo explores the heavens 7
The lens makes the picture 9
Making a simple telescope 12
Using the telescope 14
Isaac Newtons mirror telescope 16
The rival telescopes 19
The big reflectors 21
Other kinds of telescope 23
Mountings and accessories 26
Observatories and their work 28
The radio telescope 31
Binoculars 32
The first microscopes 36
The compound microscope 38
Microscopes of today 40
Binocular microscopes 41
Using the microscope 45
Some objects for the microscope 48
Preparing slides:dry mounting 49
Preparing slides:moun ting in fluid 52
Microscopes and medicine 53
The electron microscope 56
Vocabulary 59