-tiS Remarks on Mi'. Sheldrake" s 



**■ unify of light," the word harijionj mufl have been ufed, 

 as harmony of light and unity of fliade are common terms. 

 In note 43, on Du Frefnoy's Art of Painting, he (Sir Jofhua) 

 exprefsly fays : " And for the fake of harmony, the colours^ 

 however diftinguiflied in their light, fhould be nearly of the 

 fame colour in their fhadows, of a 



•' fimple unitv of fl»ade, 



" As all were fiom one fniglc palette fpread." 



Every one knows that the harmony of the pi6liire depencia 

 greatly on the fhadows not being difturbed with colour* 

 That Sir Jofhua was acquainted with the method of bring-» 

 ing forward his pictures in a ftate of black and white, and 

 glazing for the colours even in his draperies, is too true, as 

 is known to all acquainted with his practice, and was, I be- 

 lieve, the reafon of their not ftanding. His method was, 

 with ivory black, vermilion (ufcd in the carnations), and 

 white, to bring forv/ard his piftures to their full effeS, and 

 then to glaze for all the colours. It fhould be obferved, that 

 this method might only be praftifed at times, but I had my- 

 felf feveral opportunities of feeing it. 



All the advantages obtained by the pfaftice of glazing, as 

 It is called, are To tranfitory, that they may be literally faid 

 to be but the vllion of a day. Whether this arifes from the 

 gum in what is termed maguilp *, (a compofition of two 

 parts maftic vamifh and one of drying oil,) moflly employed 

 for the purpofe, or want of body of colour, I do not pretend 

 to determine, though I think both may contribute to effecSl 

 their deflrui^ion ; the colour by flying off, and the gum by 



♦ The above compofirion, when mixed on the palette, forms a confift- 

 cnce like honey, with which the colours work exceedingly free. There are 

 various compofitions for maguilps ; fome ufing wax diffolved in nut oil. 

 Others rofin and fugar of lead in the f ime folvcnt, wax in fpjrits of tur- 

 pentine, &c, : though I muft own a preference for the drying oil and var- 

 nifii for diluting the colours for the touches or pluming on a part, but for 

 the mere aft of glazing 1 prefer good clear oil. 



lofing 



