A WEEKLY ILLUSTRATED JOURNAL OF SCIENCE 
“To the 
solid ground - 
Of Nature trusts the mind which builds for aye.”—WORDSWORTH 
No. 18] 
THURSDAY, MARCH 3, 1870 
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Fourth and very much enlarged Edition, 70 Plates, 4 Coloured, 21s. 
How to Work with the Microscope. By 
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NEW WORK BY DR. BEALE, F°R.S. 
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Protoplasm; or, Life, Matter, 
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Now complete in 3 vols. medium Svo., price 63s. cloth, 
A Dictionary of Science, Literature, and 
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Eleventh Year of Publication. On the 15th of each month. 
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