Read "I am Legend" by Richard Matheson online for free on Textopian. Full text with search, annotations, highlights, and AI-powered reading aids.
THE FIRST ONE HE got was worthless.
The base was so poorly leveled that any vibration at all disturbed it. The action of its moving parts was loose to the point of wobbling. The mirror kept moving out of position because its pivots weren't tight enough. Moreover, the instrument had no substage to hold condenser or polarizer. It had only one nosepiece, so that he had to remove the object lens when he wanted any variation in magnification. The lenses were impossible.