AT a meeting of the electors to the Waynflete professorship of mineralogy, held at Magdalen College on December 13th, Mr. Henry A. Miers, M.A., Trinity College, was elected professor in the place of Prof. Story-Maskelyne, resigned. The emoluments of the professorship are £500 per annum, of which £400 is from Magdalen College and £100 from the University chest. DISCUSSION AND CORRESPONDENCE. AN EASY METHOD OF MAKING LINE DRAWINGS. ITis often difficult to get satisfactory cuts of apparatus or of natural objects to illustrate scientific articles. A half-tone, although the easiest to get, is somewhat expensive and liable to be poorly printed, and, on account of its vagueness of outline, is in many cases not as good for scientific purposes as a half diagrammatic line drawing. To get a cheap cut that can be printed on a newspaper press the original photograph must be redrawn in lines and dots. But not everyone has the time and skill to make an accurate line drawing, while if the photograph is sent off to a professional draftsman the expense is about the same as for a halftone, and the drawing frequently fails to bring out the very point to be illustrated. A line drawing with the accuracy of a photograph can, however, be easily made in this way: photograph the object, take from the negative a pale blueprint, on the blueprint trace the outlines with as much detail as desired using a cro~vquill pen and waterproof ink, put the print in water containing a few drops of ammonia, when the blueprint will fade away leaving the black lines on white ground, wash and dry, make such alternation or additions as are required, and the drawing is ready for reproduction by the zinc etching or other process. Of course if the photograph is several times larger than the cut is to be, the reproduction will be neater. E. E. SLOSSON. UNIVERSITY OF WYOIIINO.
The final column in our series on the new GAISE report looks at standards and activities for the most advanced level of data science and statistics students. The authors provide lesson plans and ideas for high school teachers, with the goal of encouraging the use of complex data sets-so common in the modern data scene-in the classroom. Comfort with such data is important for informed citizenship in today's world. Teachers and students, do you have your own experiences and perspectives to share? Consider submitting a column proposal to "Minding the Future.
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