The Emu (1901) The Emu emu11aust Year: 1901 140 Correspondence. r Emu L2nd Ocl The following diagrams roughly illustrate my suggestioi Fig Formula of the two Eggs (A and B), Fig. i. 3 4 5123 4 be d a h c d \ Fig. â 75 L Terminology. Points of an Egg. Base. Zonal point. Diametral point. Sub-apical point. Apex. Areas of an Egg. (a) Basal. (h) Zonal. (c) Sub-apical. (d) Apical. The Method of Measuring and Dividing for Description. Fig. I.âAscertain the distance of the greatest diameter from the larger end (base) of the egg, from which point all measure- ments are to be made, and make this poi
The Emu (1901) The Emu emu11aust Year: 1901 140 Correspondence. r Emu L2nd Ocl The following diagrams roughly illustrate my suggestioi Fig Formula of the two Eggs (A and B), Fig. i. 3 4 5123 4 be d a h c d \ Fig. â 75 L Terminology. Points of an Egg. Base. Zonal point. Diametral point. Sub-apical point. Apex. Areas of an Egg. (a) Basal. (h) Zonal. (c) Sub-apical. (d) Apical. The Method of Measuring and Dividing for Description. Fig. I.âAscertain the distance of the greatest diameter from the larger end (base) of the egg, from which point all measure- ments are to be made, and make this point (3) the axis of division for the intermediate points 2 and 4. The point 2 is exactly half- way between i and 3, and the point 4 is half-way between 3 and 5. Thus, we have the egg with five points (i, 2, 3, 4, and 5) and four spaces [a, h, c, d), which we can designate as areas, and which are to be used for the purposes of description. Fig. 2.âThese are lines to represent the exact lengths of the eggs (Fig. I, A and B), and intersected to indicate where the measurements of diameters are made (A and B, Figs, i, 2, 3, 4). These lines, or formulae, can be printed with the descriptions, and thus convey a definite idea of the lengths and various diameters of the eggs from which they were made. The areas a, b, c, d (Fig. I, A and B), are represented in the formulae by the same letters. The numlDers 2, 3, and 4 indicate the respective diametral measurements, and are placed above the line, with their actual measurements under the line, and opposite to them. The object of measuring from the larger end is to meet specimens like Orthonyx spaldingi, so that where the diametral point is made, the intermediate point 4, or sub-apical point, is in a position to show the degree of tapering towards the apex. In The Emu, vol. ix., part 3, page 136, S. W. Jackson gives a
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