On Friday the morning began with an explanation of "sighting" and finding proportions. Sighting is the technique of measuring and comparing the height and width of an object and the space between objects. In Philip's drawing above you can see the measuring lines he used to block in the handle and compare the measurements of the teapot.
In the afternoon, we discussed one and two-point linear perspective, in brief, and drew chairs using "sighting" and free-hand perspective. Marina's drawing above is very well proportioned and sets well into the page. Notice how the tonalities in the negative areas hold the chair and add support while making it standout from the background.