The CONTENTS:

IV. A Description 5 fsont Simple Coiours ;

by Dir. Richard Waller 689

V. 7 o nahe China Vamifhes; ty Dr. William

Shetard , 690

VI. An Examen of Ptctures propoid ; by M.

Colbert 6p 1

VII. Wax work, tni 4. iTgto Ejni of Maps

in Low-Relievo, in Franse; by . ibii.

VIII. To Cdlour Marble \ by ... . ibii.

IX. An Excraordinary Tincture ghen so «Stone ; by Dr. Salomon Reisei 692

X. Ptpert Omitte d 695

XI. Accounts of Bools, Omitted ibii.

u.-

C H A P. 'X.

Of Mustek.

I. the Tremblislg of ConsonantV^y Strings ; by X>r. Wallis p. 694

II. 7 he Defests of the Trumpet, and Trum-pet-Marine ; by Mr. Francis Roberts 695

III. The Division ofthe Monochord ; by Dr.

Wallis 698

IV. 7 he Imperfection es 4» Organ; by Dr.

J. Wall is 7 cq

V. A New Tuning cf the Lyra-Violj by 8-

Salvetti 706

VI. The Strange Effects reported of Mustek inFOrtoer Times Extmineit by Dr. Wallis

ibid.

VII. Atcounn of Looks, Omitted- 708

VOL. II

C H A P. I.

Pbystology. Meteerohgy. Tnennuttieks.

I. Ne w Regulation cf the Acade-

I mie des Sciences at Paris; by1 . Od- Geoffroy p. >

II. 1. ibe Cause cfite prefent Languid State

of Philosophy ; by OM. Lcibnitz a

2. ByDr. J. Wallis ibid-

III. A Deep Cave in the Öbservatory at Pa-ris ; byOA . ibid-

IV. i- Barometers, and Obscrvations wie

tvrth i kern ibid.

2. By Dr. J. Beat 3

3. By Dr. J. Wallis 6

4. By Dir. ßoyle 8

5. At Cabo Cors ir. Guinea; by Dir. Heatli-

cot 9

6 . In jamaica-, by Sir Will. Beeston ibii.

7. The Lowest Drgrce of the Barometer;/^

the Bithop of Cloyue ibid.

i. The Agreement of the Barometers «London end -Townley by Alr.Townley / 3 .

V. A Portable Barometer ; by Dir. Williaitf

Derham 1G

VI. 1. To Entsrge the Divisions of the Baro-meter by Dr. Hook ibid.

2 . By. .... . ,2

3. BydMr. Derham f;jj.

4. By CMr. Stephen Cray jbtd-

VII. 1. The Height of the Mercnry, at theTop of Snowden-Hill; by Mr. Halley 1 z

2. Confider'i by Dr. Wallis

VIII. sit the lop of the Monument ; by Mr,Derham

IX- 7 he Heights of the Mercurial Cylinder,tt eny Elevatio» tbove rlx Surface of theEarth ; by Dir. Halley ibid.

X.‘ t. The Reasorr cf the Ascent of the Quick-silver ; by Dr. Liffer ,8'

2. By IMr. Hdm. Haüey 20

XI* The Cause es the Sirspension es the Me «-cury,ar tuiVnusutl height t^i-Hu^ens 23

2 . By