unusual effects, right?â
Emmy nodded. The first bite from Ratty allowed you to understand rodent speech. The second bite shrank you to rodent size. And the third bite turned you into an actual rat. But they had discovered all that two months ago.
âAnd here,â said the professor, reaching for a stoppered vial, âis a supply of Saliva Rodentia Rastonia. Rat spit, to be exact.â
âGross,â said Joe.
âMy spit isnât any grosser than yours!â The Rat poked his nose out of the backpack.
Professor Capybara cleared his throat. âGross or not, you must see the benefit of having Rastonâs spit in a bottle.â
Emmy nodded. âIt means you donât have to have Ratty around if you want to shrink. You could scratch your skin and rub a little of the spit on the scratch, and it would be the same as a bite.â
âExactly right. Rastonâs bites are portable, so to speak. But Sissyâs kisses, which you need to reverse the bites, are not.â
âWe found that out the hard way,â said Joe. âRemember? That time when we were rescuing those little girls.â
Emmy glanced at Sissy, who was smoothing her rumpled whiskers. It was true that it was dangerous to shrink or turn into a rat if Sissy wasnât right there with you. You never knew if you could find her when you wanted to change back. âAnd you canât put kisses in a bottle,â she said, finishing her thought aloud.
âBut you can capture Sissyâs kisses on a sticky-patch and release them when the patch is put directly on your skin! The ratalyst makes it possible!â
âBut why do you need us?â asked Joe.
âCreating the sticky-patches is a matter of split-second timing, and itâs still in an experimental stage. If I have assistants, itâs easier for me to make observations and take notes.â
âWeâll help,â said Emmy. âWhat do you want us to do, Professor?â
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âCareful, Emmy,â said Professor Capybara. âHold her steadyâthatâs right. Cecilia, are you quite comfortable?â
âTell him if you arenât,â said the Rat anxiously, watching from the countertop, his furry face lit up by the glow of the Bunsen burner.
Sissy, held upside down in Emmyâs hand, twisted her neck to look up at the professorâs kindly, worried face. âIâm all right, as long as you hurry. The bloodâs going to my head.â
âVery well,â said the professor. âJoe, do you have the paper film ready? The rolling pin?â
âAll ready,â said Joe.
âRaston, the timer?â
âCheck.â
The mixture spooled down and spread out like thick honey, glistening and translucent on the shiny backing paper that was marked with grid lines. âNow, Joe!â said the professor.
Joe slapped a sheet of thin, clear film on top of the goop and began to roll it out. The amber goo oozed out the edges and onto the steel plate beneath the backing paper.
âTimer ⦠now!â Professor Capybara pulled off the top film, revealing a flat, smooth layer of golden-orange slime, quivering slightly. âEmmy, Ceciliaâgo!â
Quickly, carefully, Emmy held Sissy upside down over the slime and lowered her until her muzzle was almost touching the surface.
âWhiskers!â said the professor.
âOh, thatâs right,â said Cecilia, quickly bringing her paws to her face and pressing her whiskers upward. Emmy lowered her a fraction more, and she kissed the orange gel.
âWhy does Sissy have to hold back her whiskers?â asked Joe. âIs it just to keep them clean?â
The professorâs pen made a scratching sound as he added to his notes. âNo. We found that if anything else touched the goo besides Sissyâs lips, there were some unusual effectsââ He looked up at the ceiling. âWhat was that?â
All was quiet, except