Kanji #45: Measurement

This is also a primitive which means glued. 

Kanji #36: I

This is a primitive for nose. Heisig noted that the Japanese point to their noses when they say "I" in referring to themselves. 

Kanji #26: Early

This is also a primitive for sunflower. One can imagine sunflowers facing the sun as soon as it rises early in the morning.

Kanji #14: Field

It's easy to image rice fields quartered to hold enough water in each section during the rice planting season. This is also a primitive for brains.

Kanji #13: Month

This symbol is also a primitive for both the moon and flesh.

Kanji #12: Day

Again, this Kanji is so easy to remember, but it helps to imagine this as a simplified drawing of the sun. Oddly, Heisig also designates this as a primitive which stands for a tongue wagging inside the mouth.

Kanji #10: Ten

This is also a primitive that symbolizes a needle.

Kanji #6: Six

There are two primitives that make up this particular Kanji - the symbol for a top hat and animal legs represented by the two curved lines in the bottom half of this character.

Kanji #4: Four

There are 2 primitives that are introduced here. One is the symbol for mouth or an enclosure and the symbol for human legs represented by the two curved lines inside the box. 

Kanji #1: One

I concur with Heisig's observation that this Kanji is by far the easiest to remember. A pictograph of the number 1 rotated 90 degrees. Heisig also designated this as a primitive which stands for floor or ceiling.